turn signal

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Unread post by guest » Fri Oct 15, 2021 3:13 pm

2007 dodge caravan front turn signals wont work with headlights on

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carriedi
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Joined: Wed Apr 10, 2013 12:42 pm
Location: Oregon

Re: turn signal

Unread post by carriedi » Sun Oct 17, 2021 4:27 am

the closest part of the headlight system to the turn system would be the parking lights. has any one changed any bulbs lately?

Does the brake light work normally when the headlights are on?

does the hazard switch turn on the 4 way flasher on normally with headlights on and off?

because the turn signal and the park lights use the same bulbs, just different filaments, it's something that could tie the two circuits together. If it's not a bulb crossed, or something like that, You will need to do some testing with a scanner. the exterior lighting for the headlights and brake and turn go through the Integrated power module and the body control module.

With the scanner you should be able to connect to the body control module and see if the turn signal switch is requesting the light on. Comparing headlight on and headlights off. Then check the out puts on the BCM and see if it is trying to work. It's possible that you may need to reflash to see if that could fix the problem if other things all look good. Don't go and try replacing parts. test how the system works first

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