Brake lights and windshield wipers stopped working at same time

JAMIEWITHADODGE

MEMBER
2003 DODGE DAKOTA
4.3L
V6
2WD
AUTOMATIC
130,000 MILES

Replaced bulbs and fuses relays and brake switch and wiper motor. All other lights work. Just no brake lights. But let me tell you when I got the truck my brake pedal was sticking had to pull back with my foot let off the brakes bright lights work then okay. The windshield was leaking and the floor was wet. I don't know if it has anything to do with it. Okay, we change the brake switch in the floorboard and the gear shifter would not go into gear once started had to put in neutral then start drive the vehicle. That was after the bright lights went out wipers went out and same time. Please help.

Tuesday, January 26th, 2021 AT 7:07 AM

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

If these are related then I suspect the central timer module is the issue. However, let's confirm this by tackling the issue with the wiper. I attached the wiring diagram for this system so we need to test the voltage from the motor to the CTM.

The CTM grounds the wiper relay so when the wiper is off, you should have voltage on the dark green wire from the motor to the CTM. Then when you turn them on, you should have a ground signal on the yellow and green wire coming from the relay to the CTM. The way to test this is remove the relay and put your volt meter lead on battery positive and then touch this lead with the other lead. Then turn the wipers on and your meter should read 12 volts.

Let us know if you have questions. here are some guides that will help with this:

https://www.2carpros.com/articles/how-to-check-wiring

The idea is if we fix the wipers and they are related then it will fix the other issue. If not, we can get a post started on that issue and get it figured out as well. Thanks

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