Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Both headlights out

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Old 11-10-2016, 09:45 PM
  #1  
Jbomb
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Default Both headlights out

So both my headlights went out. I did some searching here on the forums to get some ideas as what to check since i thought it was odd both would die at the same time. Here is what i have done so far

Checked grounds both near the headlights one under dash and two in the trunk all looked fine.
Checked fuses under dash and all looked good.
Took out and replaced headlight switch/dimmer with a new one because old one wasn't looking so good.
Checked to see if power was going to headlight plugs and it was.
Got two new headlights and still no lights coming on.
All other lights work inside,dash,dimmer,blinkers,running lights,radio,heater,wipers.

Not sure what else to check for. if anyone can give me some ideas or something that I am missing that would be great.
Thanks guys
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Old 11-11-2016, 08:57 AM
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MonsterBilly
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if you have power at the plug for the lights, its most likely a bad ground. do your high beams work?

I would rewire them using relays anyway. THis way the switch does not power the lights. the power will come from a direct fused battery feed and the switch will only control the relays. It will make the lights much brighter.
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Old 11-12-2016, 09:47 AM
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69mach1377
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^ +1 on the relays.
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Old 11-14-2016, 03:57 PM
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Jbomb
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Got them working again,turns out new dimmer switch was doa and new #2 switch worked fine.
Thanks for the info about rewiring to relays I will be looking into that.
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