 '74 fog light relay, how does it work without grd? |
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| benalishhero |
 Sep 29 2009, 01:25 PM
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#1
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Member  Group: Members Posts: 313 Joined: 28-November 07 From: Portland, Maine Member No.: 8,384 Region Association: North East States  |
I'm at the end of some rewiring in my '74 2.0. What I can't figure out is how the fog relay is supposed to work without a ground. I have studied the diagram and as far as I can tell the relay isn't grounded.
Can anyone give me a clue? I need another set of eyes and brain for this one. Thx. Thomas |
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| benalishhero |
Sep 30 2009, 07:30 AM
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#2
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Member Group: Members Posts: 313 Joined: 28-November 07 From: Portland, Maine Member No.: 8,384 Region Association: North East States |
Still can't get them to work. My diagram contradicts.
This is how I have it set up. First off, I don't have a gry/br wire. from relay 86->wht/bl to fuse 1 87->wht/yw to foglights 85->gy/rd to K 30->rd/bk to fuse 10 from fog switch 15->bk/bl to 56(lite switch) 31->br to 31 (flasher switch) I'm quite confused at this point. |
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| 904svo |
Sep 30 2009, 09:39 AM
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#3
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904SVO Group: Members Posts: 1,124 Joined: 17-November 05 From: Woodstock,Georgia Member No.: 5,146 |
QUOTE(benalishhero @ Sep 30 2009, 05:30 AM)  Still can't get them to work. My diagram contradicts. This is how I have it set up. First off, I don't have a gry/br wire. from relay 86->wht/bl to fuse 1 87->wht/yw to fog lights 85->gy/rd to K 30->rd/bk to fuse 10 from fog switch 15->bk/bl to 56(lite switch) 31->br to 31 (flasher switch) I'm quite confused at this point. Here how it works, with lights on, power is supply to terminal #15 on fog switch with fog light switch operated power flows from K terminal (gray/red) to #86 (fog light relay coil winding) the other side of the winding (#85) white/blue goes to fuse #1 (high beam) which supply LOW RESISTANCE GROUND to operated the relay. If fuse is dirty or High beam burn out the fog lamps will not light. Word of caution here some halogen lamp do not provide low resistance ground at times!! With the fog lamp relay operated power is supply to terminal #30 (red/black) from fuse #10. Current now flows thru terminal #87 (white/yellow) to the fog lamps the other side of the fog lamps are grounded thru the brown wire. The brown wire on the switch (31) is the ground for the lamp in the switch. Hope this helps you. |
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Posts in this topic
benalishhero '74 fog light relay Sep 29 2009, 01:25 PM
SirAndy
Can anyone give me a clue?
It's grounded thr... Sep 29 2009, 02:46 PM
benalishhero
Can anyone give me a clue?
It's grounded th... Sep 29 2009, 03:09 PM SirAndy
Thx for the reply. I tried that with no luck. I... Sep 29 2009, 03:50 PM benalishhero Ya, I just tested the switch- it's fine.......... Sep 29 2009, 04:09 PM 904svo Look at the wiring diagram real close, it gets it ... Sep 29 2009, 05:09 PM SirAndy
That's why the fog lights only work with the ... Sep 29 2009, 05:58 PM 904svo
That's why the fog lights only work with the... Sep 29 2009, 09:22 PM benalishhero Solved. I had the headlight ground on the wrong co... Oct 3 2009, 06:24 PM |
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