Author Topic: Wiring  (Read 16942 times)

0 Members and 1 Guest are viewing this topic.

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #40 on: February 13, 2013, 08:59:51 PM »
Thanks, but I think the camera makes it look good, either that or adds 10 pounds, I forget which.

I just found this on-line and thought you'd find it a good read:

http://www.arcomarine.com/xhtml/Pages%2049-51%20AlternatorTechTips.pdf


Some of that hurt my brain.
My alternator looks like the one identified as "Delco self exciting style
fits mercruiser and omc"
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #41 on: February 14, 2013, 05:05:07 PM »
I've got most of both halves of the harness in as of yesterday. It was nice to have both halves of the old one out on the bench and actually use my meter to determine what was really what. Since they were so rotten on one side, I guessed (wrong mostly) when I patched in before. I am feeling more confident now that I've gotten it right after all these discussions and matching things up across the schematic and wiring chart.
I suppose I could wait until I get to this point, but when I do switch to a volt meter and reconnect the large orange wire to the starter, how will the volt meter get information? Right off a "hot" under the dash I am guessing or will I need to run another wire back? Guessing not.

No wiring today. Dead back and knees from leaning over the motor for days. Went for a ride for the first time since 2011 I think. Beautiful out. I dressed too warm though but there was hardly anyone out, of course.
Smell like 2 cycle exhaust. Better shower before the woman gets home!
« Last Edit: February 14, 2013, 05:09:09 PM by Rosscoe »
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #42 on: February 14, 2013, 05:16:35 PM »
Quote
I suppose I could wait until I get to this point, but when I do switch to a volt meter and reconnect the large orange wire to the starter, how will the volt meter get information? Right off a "hot" under the dash I am guessing or will I need to run another wire back?

The volt meter will only need to be connected to gauge power (purple & black) and fed like all the other gauges from the key switch.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #43 on: February 14, 2013, 07:39:44 PM »
Wait, that sounds too easy. I probably don't have any purple/black. I'm going to start hunting for a suitable gauge.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #44 on: February 14, 2013, 07:54:59 PM »
Not purple/black, purple AND black. Purple 12v+ from the key switch and black ground. You can tap off them from any of the other gauges in the chain.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #45 on: February 15, 2013, 10:23:18 AM »
Not purple/black, purple AND black. Purple 12v+ from the key switch and black ground. You can tap off them from any of the other gauges in the chain.

OK. Those I have.  :D
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #46 on: February 17, 2013, 10:56:59 AM »
My 90 amp fuse showed up a couple of days ago and I mounted directly to the alternator for now. One concern I have is when I switch to a volt meter and move the fuse to the starter, there isn't much room left on that main lug. Only about 1 -1 1/2 threads left on the bolt. There are currently 3 things on there now. One lug to the harness (to the dash) one to the slave cylinder and the battery.
That's an old pic. Much cleaner now but just as much stuff on that stud. Not sure if I can relocate or tap off somewhere else for one of them?
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #47 on: February 17, 2013, 11:03:42 AM »
If there isn't enough room on the starter then just leave it on the alternator. One thing though, just make sure the metal tang on the fuse isn't making contact with the metal casing of the alternator, otherwise that would create a short circuit if they touch. If you have to grind down the sharp corners of the tang so there's enough clearance between.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #48 on: February 17, 2013, 11:07:43 AM »
Yea, there is a rubber bumper type thing holding the fuse away from the Alt housing. Its still a bit close for comfort so I may do something else too. Where I put it is the only place it would lay flat.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #49 on: February 18, 2013, 08:51:04 AM »
Yesterday I ground off more of the tabs on the fuse as Rich suggested. They were a little too close for comfort and there was enough slop in the mounting hole that it possibly could have been pushed back or bumped and it would contact the alternator case. A little more clearance helps with the peace of mind.
Rich
I saw in another thread when you guys were talking about electronic ignition conversions and connecting to the correct side of the ballast resistor. I guess I am not sure which is the correct side but  after rewiring things, I made a crude schematic and after looking at it compared to the supplied instructions that came with my Mallory Unilite, it appears I've got the red wire going to the wrong side.
Do you think this is going to cause a problem? Am I going to have to move just that one red wire? I guess at the time, before the rewiring, I wasn't sure what was coming from what. Now I know but didnt look at Unilites schematic until after.  >:(
Also, generally I think using larger wire then necessary is good but in this case I am not sure due to the resistance issue. All I had for purple wire was 12 awg and need a piece to go from the B resistor to the + side of the coil. Ok? Not ok?
« Last Edit: February 18, 2013, 08:54:37 AM by Rosscoe »
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #50 on: February 18, 2013, 09:04:26 AM »
Looks good to me.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #51 on: February 18, 2013, 09:35:29 AM »

Ok good. You had mentioned the voltage being higher on one side then the other. I'm good without having to re-do it, thats for sure.
Now that I looked at it AGAIN, it does match Unilites wiring.
Thanks
« Last Edit: February 18, 2013, 09:38:22 AM by Rosscoe »
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #52 on: February 20, 2013, 06:21:00 PM »
Mo questions Rich.
I replaced my ammeter today with a volt meter so I don't need that additional orange high current wire running up there. So back near the starter I cut the large orange wire that was going non stop from the alternator to the ammeter and put some shrink tubing on it. As we discussed, I should now just connect that orange to the main starter lug.
Up front I poked around with my meter and verified that in fact, the large orange wire changed to white on the other side of the under dash plug. That white used to go to the ammeter along with 3 fused reds that fed the switch, the main red from the harness/Bat and large ground. I should only need power and ground to the volt meter, correct? Obviously I need power for everything else AND I think the Main Red Battery wire should be fused. My plan is to put in a heavier duty terminal block and run the mains there, then branch out. I dislike all that daisy chaining but may not be able to get away from all of it. Depends on the terminal block I end up getting.
So my questions are buried in my ramblings. Guess what I am asking is:
1. I should cut the orange from the now fused alternator and attach directly to the starter?
2. The large white wire under the dash should now be useless? You mentioned before that the orange and white might be one in the same. I see what you mean now.
3. Volt meter should just require a (smaller gauge) hot and ground (and power for the light)?
4. What would you recommend the main power feed be fused at?
As it stands now, the switches are all that are fused. Blower motor-10 amps, Bilge pump-15 amps and lights-20 amps
When I get things more cleaned up, I'll need to verify the current wires at the ignition switch need to stay the way they are or if I can clean them up. Actually I just looked at my sketch, the old main that was on the ammeter used to feed the ignition switch so I'll have to change that and supply power from whatever terminal block I get.
Anything sound wrong?
« Last Edit: February 21, 2013, 06:46:22 PM by Rosscoe »
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #53 on: February 20, 2013, 10:26:58 PM »
Quote
1. I should cut the orange from the now fused alternator and attach directly to the starter?
Yes

Quote
2. The large white wire under the dash should now be useless? You mentioned before that the orange and white might be one in the same. I see what you mean now.
Correct

Quote
3. Volt meter should just require a (smaller gauge) hot and ground (and power for the light)?
Yes, but your hot wire has to come from the key switch or any of the hot wires powering the other gauges, usually purple colored. Keep the gauges daisy chained because they are all powered from off the keyswitch.

Quote
4. What would you recommend the main power feed be fused at?
Your main fuse should probably be no less than 30 amps.

Quote
As it stands now, the switches are all that are fused. Blower motor-10 amps, Bilge pump-15 amps and lights-20 amps
I don't know why you have a 20 amp fuse on the lights, it's probably overkill so a 7.5 or 10 amp fuse would be sufficient.

Quote
the old main that was on the ammeter used to feed the ignition switch so I'll have to change that and supply power from whatever terminal block I get.
The red main wire in your harness becomes the replacement for the orange (turned white) that you're removing.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #54 on: February 21, 2013, 07:03:31 AM »
All sounds good. Yes I thought it was peculiar that the lights had the largest fuse of the three. I'll down size it especially seeing that the gauge lights at least in the case of the tach, have what appears to be 22 awg wire.
I plan on adding/changing my terminal block to something that can handle more current today. Would you hook the mains there, then run power to the ignition switch? The lugs on the ignition are fairly small so I'd rather not connect those 10 awg wires there.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #55 on: February 21, 2013, 08:43:12 AM »
Quote
Would you hook the mains there, then run power to the ignition switch? The lugs on the ignition are fairly small so I'd rather not connect those 10 awg wires there.

Yes you can do that. But I probably wouldn't use smaller than 12ga to go from the terminal block to the key switch. Remember that power feed is not only for the gauges but goes all the way back to the engine for the ignition system.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #56 on: February 21, 2013, 09:47:37 AM »
OK I'll stay with 10-12 gauge for the main feeds.
Thanks again.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline CVX Fever

  • Hero Member
  • *****
  • Posts: 2000
Re: Wiring
« Reply #57 on: February 21, 2013, 05:38:59 PM »
Rich is the man! So much knowledge and so helpful.

Ross - Your going to be the resident MNCGOA marine wiring expert when your all done with this project!
1979 CVX18 "Back in Black"....someday!
1985 CVX18 " Only thing better than 2 CVX18's is 2 girlfriends!

Offline Hyperacme

  • Administrator
  • Hero Member
  • *****
  • Posts: 13623
Re: Wiring
« Reply #58 on: February 21, 2013, 05:55:28 PM »
HA HA ...
My CV will need some wiring Ross ...
Should be easy after what your going thru !

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #59 on: February 21, 2013, 06:51:57 PM »
Kip, I don't think so. It will still be Rich.  ;D
Unfortunately, my memory retention is pretty short. If I mess with something long enough, some will stick.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag