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Old 12-04-2011, 09:26 PM   #1
memo43
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what terminal is what headlight switch

So I finaly rep;
lace my headlight switch again. I was wondering if someone can please tell me what terminal does what on the switch.
I have a EZ wireng harness and the only wires that I ave going to the switch are ;gauge pwer, headlight power, dimmer front and rear markers.
can someone please help out.
I did a search and came up with schematics that are to confuseing.
thanks in advance
also how do I hook up my dome light?


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Old 12-04-2011, 11:18 PM   #2
VetteVet
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Re: what terminal is what headlight switch

Attachment 1 is for pre 1969 and 2 is for the 69 on.

Name:  HLightSwitch.jpg
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Name:  Headlight Switch 1.jpg
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Old 12-04-2011, 11:34 PM   #3
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Re: what terminal is what headlight switch

Thanks for the promt reply.
This is exactly what I was looking for.
An from one current service member to another thanks for your service.

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Old 12-05-2011, 12:11 AM   #4
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Re: what terminal is what headlight switch

Glad to help and thanks to you. and all you great guys. Stay safe.

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Old 12-08-2011, 09:39 PM   #5
Evil Trailblazer SS
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Re: what terminal is what headlight switch

Vette, Terminal 3 is empty but is part of the same circuit as the marker/parking lamp circuit, so this is where cab lights would connect to, right? What connects to the flat spade ground on the top of the headlight switch? I am dealing with my '87 V30 and I am finding lots of hacked up wiring from previous mechanics...please help if you can!
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Old 12-09-2011, 01:08 AM   #6
VetteVet
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Re: what terminal is what headlight switch

The terminal 3 on the switch has a jumper to the tail lights so that the parking lights stayed on when the switch is pulled out all the way. The pre 69 parking lights would go off when the headlights were pulled on.
I think the flat spade is just to ground the headlight switch so that the interior and dome light circuit to ground is complete whenever the switch knob is rotated all the way to the right. Don't quote me on this as the earlier switch in the first diagram has the flat spade and the wiring diagrams show it to be for a white wire that completes the ground circuit for the dome light. I have posted the diagrams and a blue arrow shows the white wire from the headlight switch to the dome light.

Name:  2 Cab-2-web.jpg
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Name:  Cab-1web 1.jpg
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Name:  !cid_41C4D85D17D9418AA9AE410DA9D317A1@OWNER.jpg
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Old 12-09-2011, 01:13 AM   #7
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Re: what terminal is what headlight switch

the cab lights connect to the spade in the lower left corner of the switch diagram I posted for the later trucks but I am not sure how far into the newer years that goes so don't take that to the bank.
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