The headlight on the right side is dim.

[don-ohio]

Eddie bauer 4.0 1993: When the fan speed is below med-hi the headlight dims and the right turn signal indicator on the dash glows. This has been going on quite a while,and I wonder why I haven't asked about it sooner.
Has anybody run into this problem?
I am not great on wiring,just the basics is what I know.
I appreciate any info. I did a search but couldn't find anything except something about an LOM? What's that? don-ohio ^)

 

[BrooklynBay]

That part is the control module for the speedometer. Did you check the charging system with a voltmeter? Are your battery cables corroded? Did you check the wiring for the light bulbs? Are the ground connections clean without corrosion?

 

[don-ohio]

Answer is yes,no,no and no.I haven't checked into the wiring connections at the lights,but WHY would the heater fan selector being below medium high cause this? How is the heater fan speed switch related at all to the headlight circuit?
Thanks,Brooklyn, and I'll try to check the wiring.I know bad grounds can cause a lot of trouble.I just have been living with it by keeping the fan switch blowing at med-hi or high. don-ohio ^)

That part is the control module for the speedometer. Did you check the charging system with a voltmeter? Are your battery cables corroded? Did you check the wiring for the light bulbs? Are the ground connections clean without corrosion?

 

[BrooklynBay]

The headlights pull a lot of current just like the blower motor, so when both are on at the same time, you will need sufficient current to run both circuits.

 

[don-ohio]

Right,Brooklyn, but the more power I put to the heater fan,the brighter the headlight. don-ohio

The headlights pull a lot of current just like the blower motor, so when both are on at the same time, you will need sufficient current to run both circuits.

 

[BrooklynBay]

The alternator is probably working harder to maintain sufficient current. Wire brush the battery teminals, and sandpaper the ground connections, then do a before & after charging system test with a voltmeter. Use an anti-oxidant cream on the metal contacts after you clean them to prevent new corrosion.

 

[don-ohio]

Okay!Thanks! Sounds like it might help! I'll try it out tomorrow.don-ohio

The alternator is probably working harder to maintain sufficient current. Wire brush the battery teminals, and sandpaper the ground connections, then do a before & after charging system test with a voltmeter. Use an anti-oxidant cream on the metal contacts after you clean them to prevent new corrosion.

 

[don-ohio]

Couldn't get to it,Brooklyn,but Ima'tryin'to.My wife's got me honey-doing every which way from Sunday,and my Step-son just called from Cincy needing me to go down and pick him up.LOL! Boy! What a life! don-ohio ^)