71 Challenger - no low beams, only high beams(RESOLVED)
#2962871
09/11/21 09:27 AM
09/11/21 09:27 AM
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Joined: Mar 2005
Posts: 2,058 NW/Indiana - Chi town
ricomondo
OP
top fuel
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OP
top fuel
Joined: Mar 2005
Posts: 2,058
NW/Indiana - Chi town
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I'm helping a friend with his 71 Challenger issue:
Started out with low beam headlights went out - car already had new dimmer switch, and all other lights work; dash, tail, parking. But when the dimmer switch is activated on high beam, all 4 lights work.
Thought maybe it was the headlight switch, so he bought a new dash switch and I swapped it out for him. The low beams then worked.
Fast forward to last night he was at a cruise night and when he turned on the headlight switch, the same issue, no low beams, so he had to drive home with all 4 lights on high beam.
Before I trek out to his place, looking for suggestions?
Could the low beams on both side be bad? If so, why would they go on when the high beam is activated? Could the new dimmer switch be bad?
TIA!
Last edited by ricomondo; 09/11/21 03:15 PM.
GY3 71 Demon 340
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Re: 71 Challenger - no low beams, only high beams
[Re: John_Kunkel]
#2963006
09/11/21 03:15 PM
09/11/21 03:15 PM
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Joined: Mar 2005
Posts: 2,058 NW/Indiana - Chi town
ricomondo
OP
top fuel
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OP
top fuel
Joined: Mar 2005
Posts: 2,058
NW/Indiana - Chi town
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Thank you everyone - I brought my FSM and tester to his house and after some tests, we wound up replacing both low beam headlights and that solved it!
Thanks again!
GY3 71 Demon 340
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Re: 71 Challenger - no low beams, only high beams
[Re: ricomondo]
#2963101
09/11/21 08:37 PM
09/11/21 08:37 PM
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Joined: Jan 2003
Posts: 15,299 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,299
Omaha Ne
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Thank you everyone - I brought my FSM and tester to his house and after some tests, we wound up replacing both low beam headlights and that solved it!
Thanks again! thanks for the report back Strange that it would lose both low beams at the same time, Myself, I would still check the grounds and also the charging system to make sure its not overcharging.
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Re: 71 Challenger - no low beams, only high beams
[Re: TJP]
#2963211
09/12/21 11:56 AM
09/12/21 11:56 AM
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Joined: Apr 2003
Posts: 12,229 Looking for a way out of Middl...
IMGTX
I Live Here
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I Live Here
Joined: Apr 2003
Posts: 12,229
Looking for a way out of Middl...
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Strange that it would lose both low beams at the same time, Myself, I would still check the grounds and also the charging system to make sure its not overcharging. It is strange but I have seen it more than once. I usually chalked it up to people who wait until they can't see anything before they replace the bulbs but high voltage/overcharging could be a culprit.
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