Author Topic: Headlights not Working  (Read 884 times)

Offline 69mustang73mach1

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Headlights not Working
« on: December 03, 2016, 11:28:37 PM »
Hi Everyone, I have a new challenge with the 68 Mercury.  All my lights  work except for headlights and flashers.  I checked the wiring harness where the main harness connects to the headlight harness.  I used my test light and had power on one connectors.  But no headlights.  What should I do next?

All I did on the flashers was push the steering column flasher button in and now it is stuck.  Any guidance to my next step?

Still not to bad for sitting in the junk yard for 40 years.  Thanks Mark
« Last Edit: December 05, 2016, 11:03:50 PM by 69mustang73mach1 »
Mark
1969 Ford Mustang Sportsroof, 390-4V
Dearborn built on Oct 31, 1968
1973 Ford Mustang Mach 1, 351C-4V
Dearborn built on Oct 31, 1972
1968 Mercury Park Lane Convertible, 428-4V
St Louis built on Apr 19, 1968

Offline 69mustang73mach1

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Re: Headlights not Working
« Reply #1 on: December 06, 2016, 11:04:05 PM »
Any ideas from anyone?  Thanks Mark
Mark
1969 Ford Mustang Sportsroof, 390-4V
Dearborn built on Oct 31, 1968
1973 Ford Mustang Mach 1, 351C-4V
Dearborn built on Oct 31, 1972
1968 Mercury Park Lane Convertible, 428-4V
St Louis built on Apr 19, 1968

Offline Bob Gaines

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Re: Headlights not Working
« Reply #2 on: December 06, 2016, 11:56:21 PM »
Any ideas from anyone?  Thanks Mark
If it were a Mustang I would say check or substitute the headlight switch because that is where many faults are. I don't know about the 68 Mercury you are working on unless it is a Cougar in which case is basically the same as a Mustang.
Bob Gaines,Shelby enthusiast, Shelby collector , Shelby concours judge SAAC,MCA,Mid America Shelby

Offline max67

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Re: Headlights not Working
« Reply #3 on: December 07, 2016, 08:32:28 PM »
Likely a bad connection at the dimmer switch.

Offline 69mustang73mach1

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Re: Headlights not Working
« Reply #4 on: December 07, 2016, 11:29:36 PM »
Thanks guys.  I just started to find a new headlight switch.  Not an easy task being a Mercury.  How would I check the dimmer switch to see if that's the problem?  Thanks Mark
Mark
1969 Ford Mustang Sportsroof, 390-4V
Dearborn built on Oct 31, 1968
1973 Ford Mustang Mach 1, 351C-4V
Dearborn built on Oct 31, 1972
1968 Mercury Park Lane Convertible, 428-4V
St Louis built on Apr 19, 1968

Offline max67

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Re: Headlights not Working
« Reply #5 on: December 08, 2016, 07:53:59 PM »
Unplug the dimmer switch , pull the headlight switch all the way out, and check the wire plug from the dimmer for power.  Likely you will find some corrosion on the terminals inside the plug.

Offline jwc66k

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Re: Headlights not Working
« Reply #6 on: December 10, 2016, 12:39:10 AM »
I just started to find a new headlight switch.  Not an easy task being a Mercury.  How would I check the dimmer switch to see if that's the problem? 
PM sent.
Jim
I promise to be politically correct in all my posts to keep the BBBB from vociferating.

Offline 69mustang73mach1

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Re: Headlights not Working
« Reply #7 on: December 10, 2016, 08:44:58 PM »
Thanks everyone.  I tested the dimmer switch and no power.  Got one from my donor car.  Suddenly I have headlights.  Both low and high beams.  Thanks again for leading me in the right direction.  Mark
Mark
1969 Ford Mustang Sportsroof, 390-4V
Dearborn built on Oct 31, 1968
1973 Ford Mustang Mach 1, 351C-4V
Dearborn built on Oct 31, 1972
1968 Mercury Park Lane Convertible, 428-4V
St Louis built on Apr 19, 1968