Running lights aren't working

[Eric W]

Hey new here hoping you all can help me. My problem is that tail lights that come on with the headlights aren't coming on like they are supposed to. One day I was playing with it and got them to come on with just pulling it a little but when I turn on my headlights the tail lights will go off. So I went ahead and replaced the headlight switch and it is doing the exact same thing as it did with the other switch. I did notice when I was replacing the switch that the rod was bent. Could that have anything to do with it or is it something else?

 

[miesk5]

yo ERIC,

WELCOME,

Please post the year, and in future;

as soon in your profile, include your year, engine, trans, Xfer case & locking hub type (auto or manual) and any major mods such as body or suspension lift, etc. or in any question post. You'll get more accurate replies

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for now;

What did you pull it a little? The Switch or wiring harness?

Wiring Diagram & Testing in 92-96; "...The only significant difference between '92-96 and '80-91 is that the MFS's DIMMER switch replaced the older beam select switch, but they perform the same function..."

by Steve

See the "To Test" block in lower right corner

Park Lamp Circuit

Test your old switch with that info if you still have it

Wiring Diagram in 87-89 Bronco & F series (Mitchell); MIESK5 Note, page 2 shows the 4.9 EEC and injectors, etc.; page 3 and on show 5.0 & 5.8; & 7.5 for F series



Source: by equivalent (Beetlejuice) at SuperMotors.net