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70 Charger headlight door problem, elec. #3047823
06/04/22 10:03 AM
06/04/22 10:03 AM
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jlatessa Offline OP
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It's been on the road for 6 years, and everything has been fine up to now.

Doors quit working a few days ago and I did a couple of voltage checks at the motor
and the relay assembly. When I rewired the car, I put the relay asbly into the engine compartment
and used a Bosch relay with the little canister type, two connecter "relay"? attached with a tie wrap
just to make it easier to service.

No voltage to the motor with the lights on, and just trace voltage, (3 or 4) to the little canister terminals.

Where do I go from there to figure this out?

Thanks,

Joe

Edit, I guess I should patch another Bosch in, but I've never had one fail before??

Last edited by jlatessa; 06/04/22 10:06 AM.
Re: 70 Charger headlight door problem, elec. [Re: jlatessa] #3047844
06/04/22 12:22 PM
06/04/22 12:22 PM
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Valencia, España
NachoRT74 Offline
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What relays are we talking about?

Headlight doors just use one, and is triggered from light switch, hence inside the cab since must be before the floor dimmer switch.

Headlights relay upgrade themself would require two, one for each beam (although could be wired diff, but that's the standard one) and that one could be installed on engine bay, althought I installed mines into the cab between floor dimmer switch and bulkhead for a cleaner view into engine bay without relays.

So, if the doors are not coming up and headlights are working, problem is on doors relay, motor or motor wiring... or lack of ground at relay or motor.


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: 70 Charger headlight door problem, elec. [Re: NachoRT74] #3048017
06/05/22 12:43 PM
06/05/22 12:43 PM
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NachoRT74 Offline
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I must add, the headlight doors relay even is triggered by the light switch is SOURCED by the Run circuit and in stock from gets a circuit breaker on this line. So, still if the trigger signal is not working, relay should still be sourcing for some of the circuits. If no one of both wires for open or close the doors is live with ign key in RUN, you can get a relay failure, circuit breaker failure or this source is broken before the relay/breaker.


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: 70 Charger headlight door problem, elec. [Re: NachoRT74] #3049086
06/09/22 09:59 AM
06/09/22 09:59 AM
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jlatessa Offline OP
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Thanks all, Natcho, I found your schematic on the 3 wiring options, I used #3 and ordered
another 5 pin relay, but after looking at the wiring and the initial test I did,
I think we've lost the 12 V supply.

It's been awhile since we drove at night, and we've done some alterations to our wiring in the interim, so
we'll start there.

Thank you all,

Joe

Re: 70 Charger headlight door problem, elec. [Re: jlatessa] #3049123
06/09/22 01:07 PM
06/09/22 01:07 PM
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jlatessa Offline OP
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First Nacho, sorry for misspelling your name, second, since I moved the headlight door breaker and relay next to the headlight
upgrade relays when we rewired, why don't I tap into the 12 V wire going to the low beams for door initiation?

I'll just terminate the old wire....

Joe

Re: 70 Charger headlight door problem, elec. [Re: jlatessa] #3049232
06/09/22 08:33 PM
06/09/22 08:33 PM
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6PKRTSE Offline
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Don't forget. There is always the manual knob on the motor to open and close them in case of emergencies.


1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
Re: 70 Charger headlight door problem, elec. [Re: 6PKRTSE] #3049260
06/09/22 10:57 PM
06/09/22 10:57 PM
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jlatessa Offline OP
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Yep, thanks

Joe

Re: 70 Charger headlight door problem, elec. [Re: jlatessa] #3049352
06/10/22 11:03 AM
06/10/22 11:03 AM
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NachoRT74 Offline
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Originally Posted by jlatessa
First Nacho, sorry for misspelling your name, second, since I moved the headlight door breaker and relay next to the headlight
upgrade relays when we rewired, why don't I tap into the 12 V wire going to the low beams for door initiation?

I'll just terminate the old wire....

Joe


relay must remain into the cab because the trigger is before the floor dimmer switch. If you tap the trigger into the low beam signal, door will close as soon you put high beams... if the relay is being sourced of course.

Also, the 12 volts power should be tapped into a keyed circuit... run or acc. Originally is onto the run circuit, to allow to keep doors open while in acc for beams adjustment or replacement without get doors closed as soon you turn off the lights

there is no reason to move to the engine bay

( don't worry about the name misspeling LOL )



With a Charger born in Chrysler assembly plant in Valencia, Venezuela






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