boycecd

Hello got a small electrical issue some where , when I hit the brake pedal with the lights off my running lights come on and odometer goes dim any idea what this might be ?

Pelican

Uh, Year?

boycecd

Sorry a 2001 sport

southsidecatac

Well, you asked for the year so now give your advice.....

cruiser54

A bad ground somewhere in the brake light system.

Corroded brake light bulb socket.

I would do a thorough inspection of the park light, marker light, turn signal, and brake light functions. Might get a clue from that.

JDHDrum

Check your brake light bulbs. Had this happen in an old S10. One of the the bulbs was shorting within itself. Every time I hit the brakes it would send power through the running light wires.

cruiser54

Exactly.....

XJNATION1997

Search "NSS relate brake light issue"

boycecd

Thank you guys did check bulbs none were shot or corroded looking so going to replace bulbs and go from there any more suggestions ?

cruiser54

Check the front turn signal bulbs at the same time.

boycecd

Yes sir checked every bulb on it turn signals, side markers,and tail lights !

cruiser54

Do those new-fangled 2001s have some kind of flasher/lighting module up under the passenger side dash?

boycecd

Not sure will check and see ! Not in the fuse panel?

cruiser54

Correct. Not in the fuse panel.

JDHDrum

Pull one brake bulb and hit the pedal. If the problem is still there put it back. If the problem goes away you found the culprit. Repeat for other brake light bulb if necessary. If that doesn't fix it then you start at one end of the wiring harness and work your way to the other. Anyplace there is a plug you can disconnect it and hit the pedal to see if it fixes it. Electrical shorts are not fun to track down. Good luck.