This is topic Highbeams only??? in forum Tech Talk at Northern California Ford Owners  .


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Posted by SilverLX351 (Member # 3207) on :
 
I have an 88lx convertible I bought, and the highbeams only work, the lowbeams do not. I changed the blinker switch and headlight switch but it didnt help. any ideas on this?

thanks
 

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Posted by Black94 5.0 (Member # 655) on :
 
Check the bulbs?...It is possible that both L&R low beams could be out on the bulbs...
 

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Posted by stangsta (Member # 4054) on :
 
chek the harness..it might of had previous high wattage from some.lets say apc bulbs??
 

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Posted by mtbaughs (Member # 4052) on :
 

quote:

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Originally posted by Black94 5.0:
Check the bulbs?...It is possible that both L&R low beams could be out on the bulbs...

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Yes it's likely you blew the filament for the low beams but not the high beams. If they are good check for power at the harness side.
 

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Posted by hidnn.o.s. (Member # 1219) on :
 
Bulbs were replaced right away to see if it was that easy. Wasn't it.
 

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Posted by mtbaughs (Member # 4052) on :
 
Could be a bad headlight switch inside the car, or an issue with the wiring from the swtich to the bulb. Also make sure you replaced the bulbs with the right ones though I am sure you did not. Also check your fuses that might be it
 

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Posted by 94gt (Member # 3060) on :
 
I would look more towards the switch, I believe that the power comes thru the the same wire for both the high and low operation.
 

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Posted by JohnB (Member # 969) on :
 
You have a bad turn signal switch. Power goes through this switch for the headlights. If the switch is bad, there is a internal fail-safe that allows for operation of the headlights in 'high-beam only'. Make sure that the connector is fully engaged on the switch first; if it doesn't fix it, change the switch.
 

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Posted by SilverLX351 (Member # 3207) on :
 
I changed the blinker switch and headlight switch but it didnt help, and the parts came out of cars that didnt have this problem. The bulbs are new. I wasnt getting email notifications, thats why I didnt answer. Thanks for the replys, hat should i look for in the harness, and any particular wires? thanks
 

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Posted by 94gt (Member # 3060) on :
 
how did the contacts on the switch look whe you put it in?
 

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Posted by SilverLX351 (Member # 3207) on :
 
looked normal, nothing out of the ordinary. Looks like i need to trace out some wires....
 

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Posted by mtbaughs (Member # 4052) on :
 
you checked all your fuses right?
 

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Posted by SilverLX351 (Member # 3207) on :
 
yes I did, but there isnt a fuse that would make this happen anyway....
 

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Posted by vpr_klr (Member # 3353) on :
 
sounds like a bad ground, had the same problem in my 91, check the ground wires from the harness using a test light to battery power and see if the test light come on, you may have a open wire that you will not be able to see
 

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