No headlights...

[Oystercopy]

I know there's been posts here before, and I looked through those to get any ideas I could. All my other lights come on except the headlights. I know there's been talk here about doing the relay upgrade, but I don't believe that's been done to this car. I did check all the fuses and none are blown. There is, however, what appears to be a relay, directly connected to the fuse box, that might be the headlight relay. The part number on it (it's an original Chrysler part) is 2926327 and I have attached pictures here. I'm simply wanting to check to see if this relay is good, but it has 3 connections and only two of them ohm out. Since its such an old part, I thought about replacing it to see if I get lights. Any advice welcome! - OC

 

[Oystercopy]

OK, well I just did a little more research, and it appears that part number is a Horn Relay and not a Headlight Relay.. bummer... any idea what else might be wrong?

 

[Oystercopy]

OK, so I found a loose wire under the dash, one going into the main connector in the harness, lights fixed. I should have opted to replace that entire harness the last time I had it in the shop.

 

[moparleo]

Ground issue are the number one problem with 60's-70's Mopars.
50 year old wiring harnesses are just a constant headache

 

[Challenger RTA]

Check the foot dimmer switch. It is a weak point. There is a replacement plug for it. The power to the headlights goes through there.
Use a test light to see if you have power there.

Maybe the switch too?

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[Challenger RTA]

I should have opted to replace that entire harness the last time I had it in the shop.

Not really. You would end up fixing the design faults of the new harness too as the old.

 

[bc3j]

I still have 55 year old wiring, but I use a headlight wiring harness with relays from Crackedback, Rob Yule. His harness is excellent workmanship with upgraded wiring isolating the inadequate factory headlight wiring from the system. Using his harness connected directly to the alternator I have bright headlights with no dimming at idle.