Front wipers not working after installing aftermarket radio

[Porscheguy957]

Hi everyone,

I recently installed an aftermarket radio into my 957 and everything is working great, except one thing…I now cannot use my front windshield wipers. The washer fluid however works great and so does the rear wipers. So I guess I will add some background info in case a body has had a similar experience. I added a fuse to the passenger fuse box in the empty location of 48. It is acc power for my head unit. I also installed a CAN bus decoder that I got from Amazon. I know that the wipers and pcm operate on the same CAN bus so I am suspecting it could be this. Lastly, I have a very skinny brown wire that came from the C14 connector of the OEM harness and don’t have it connected to anything as I think it refers to the cd changer. If I unplug the circuit that I added, the wipers go back to working just fine. So I know that the motor is still good and operable. Any help?????

[ekstroemtj]

Did you work lately on your car? Can you hear the wiper motor?

[ekstroemtj]

Sorry, I should read more carefully.

 

i guess the reason is your work on the electric/ can bus.

 

can you go back and try it again with the original wiring?!

[Porscheguy957]

On 3/27/2022 at 9:40 AM, ekstroemtj said:

Sorry, I should read more carefully.

 

i guess the reason is your work on the electric/ can bus.

 

can you go back and try it again with the original wiring?!

Hey, i decided to splice the new connector in so that would be a little bit of a pain. I had a different head unit that was aftermarket as well and the wipers also didnt work with that one. The CAN bus decoder stayed the same so I am left to believe the problem lies within that. Do I return the decoder and try a different one or will that change nothing is my next question I guess. I have also tried running the add a circuit from other 10 amp fuses and that didnt change anything either so I am confident with the placement of it in fuse 48's empty slot.