Head Light Relay Upgrade on a 67 RS - Team Camaro Tech
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post #1 of 20 (permalink) Old Mar 11th, 09, 02:06 PM Thread Starter
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Head Light Relay Upgrade on a 67 RS

Has any one done this ?
I can get everything to function except my high beams need to
be on for the doors to close. Does the current loop back some how thru
dimmer switch or headlights ?

Rick
67 RS/SS 355, Autogear M21 (w/Overdrive), 8.5w/3.42



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post #2 of 20 (permalink) Old Mar 11th, 09, 04:13 PM
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Re: Head Light Relay Upgrade on a 67 RS

Sounds like the headlamp door relays have a wire swapped somewhere. Someone posted a schematic just days ago in this forum.

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post #3 of 20 (permalink) Old Mar 11th, 09, 04:55 PM Thread Starter
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Re: Head Light Relay Upgrade on a 67 RS

Everything works fine without the relays.
Just acts up when relays are wired in.
Thinking I may have to install another diode in
the new relay circuit.

Rick
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post #4 of 20 (permalink) Old Mar 11th, 09, 09:12 PM
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Re: Head Light Relay Upgrade on a 67 RS

You may be right. It's hard to say without seeing a schematic of how you have it wired up.

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post #5 of 20 (permalink) Old Mar 12th, 09, 04:09 AM
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Re: Head Light Relay Upgrade on a 67 RS

http://www.gvtc.com/~rlaa/ wiring diagrams.

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post #6 of 20 (permalink) Old Mar 12th, 09, 04:49 AM Thread Starter
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Re: Head Light Relay Upgrade on a 67 RS

I'm just breaking the tan & green circuts for the headlights with 2 relays.
Just like you can do in the 68 & 69.

Rick
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post #7 of 20 (permalink) Old Mar 13th, 09, 09:05 AM
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Re: Head Light Relay Upgrade on a 67 RS

The stock system requires using the ground path through the headlamps to allow the doors to close (not required for them to open). Depending on the new relay harness you are using for the lamps it may be breaking that ground when you turn off the lights. Do you have a drawing of the new harness that you can post? I think there is a way to do this if the ground path is being broken by the new harness but, it requires modifying the stock system to add another relay and create the ground path for the closing circuit.

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post #8 of 20 (permalink) Old Mar 13th, 09, 09:43 AM Thread Starter
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Re: Head Light Relay Upgrade on a 67 RS

Quote:
Originally Posted by mdevereaux View Post
The stock system requires using the ground path through the headlamps to allow the doors to close (not required for them to open). Depending on the new relay harness you are using for the lamps it may be breaking that ground when you turn off the lights. Do you have a drawing of the new harness that you can post? I think there is a way to do this if the ground path is being broken by the new harness but, it requires modifying the stock system to add another relay and create the ground path for the closing circuit.

It is a stock RS harness,, I tried breaking the lt green & tan wires to the bulbs with 2 relays like Madd Elec shows. I've been trying to come up with a way for the RS set up. Figured I was missing something,, maybe a 3rd relay or diode to make ground connection ?

Rick
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post #9 of 20 (permalink) Old Mar 14th, 09, 05:54 AM
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Re: Head Light Relay Upgrade on a 67 RS

I think this is one way to make the modification. By adding a relay that changes the ground path for relays 2 and 3 when the headlight switch is off should allow the doors to close when the ACC is hot and headlights are off.


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post #10 of 20 (permalink) Old Mar 14th, 09, 08:52 AM Thread Starter
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Re: Head Light Relay Upgrade on a 67 RS

Thanks,, i'll give it a try & let you know

Rick
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post #11 of 20 (permalink) Old Mar 15th, 09, 03:11 PM Thread Starter
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Re: Head Light Relay Upgrade on a 67 RS

Your wiring diagram should work except I get 7 volts to the R1 wire after turning headlight switch off ( thru diode) & the relay won't drop out.

Rick
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post #12 of 20 (permalink) Old Mar 16th, 09, 12:39 PM
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Re: Head Light Relay Upgrade on a 67 RS

Did you disconnect the wire that went from the R1 coil to the R2 and R3 coils in the original setup? There should be no voltage on the new relay coil from the ACC line that would hold it closed per my drawing. I used the diagram from the RS wiring manual. Unless there is another path that is not shown in the manual the new relay coil should not be connected to the ACC line. I'm sorry I do not have my car out of storage yet to try this on my own.

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post #13 of 20 (permalink) Old Mar 16th, 09, 04:22 PM Thread Starter
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Re: Head Light Relay Upgrade on a 67 RS

No i didn't cut r1 wire, wanted to make sure it would work before cutting harness up. Thought I was getting voltage thru the acc line after turning the headlight switch off. After looking over diagram again, it may be a feed back thru the r2 & r3 coils. I'll try again tomorrow by cutting line.

Thanks

Rick
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post #14 of 20 (permalink) Old Mar 17th, 09, 02:04 PM Thread Starter
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Re: Head Light Relay Upgrade on a 67 RS

Mdevereaux, thanks for your help. That wiring diagram worked out just fine. All is working good.

Rick
67 RS/SS 355, Autogear M21 (w/Overdrive), 8.5w/3.42



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post #15 of 20 (permalink) Old Mar 18th, 09, 08:08 AM
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Re: Head Light Relay Upgrade on a 67 RS

I am glad it worked out. I have been waiting to do this to my RS/SS. Now if only spring will get here to Michigan so I can pull her out of storage.

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