Wiring

Hi
I have a 2004 c3 hdi and need to add a separate switch on the dash for the wipers as the bsi ecu has stopped the wipers working please could someone tell me how to wire a toggle switch in toile the wipers work please
Pictures also if pos
Thanks

Odd-job wrote:Hi
I have a 2004 c3 hdi and need to add a separate switch on the dash for the wipers as the bsi ecu has stopped the wipers working please could someone tell me how to wire a toggle switch in toile the wipers work please
Pictures also if pos
Thanks

Hi Odd-job
If you pick up a copy of the C3 Haynes manual from here it has the wiring diagrams from the wiper motor and you can make something work from that.

You have done enough diagnosis to determine that its the BSI and not the wiper motor, COM2000, wiring or bus that has caused the problem, so you won't have any problems with the haynes diagrams


There are no diagrams or drawings on the forum for what you are asking, repairing the BSI would be the best way forward for this if anyone else reading this has faulted it down to the BSI. Have a look at the BSI board repair reading topic.

Thanks for reply I do have a Haynes manual but
Not too good when it comes to reading wiring diagrams only reason I managed to do any bsi test was from help from people on this website YouTube and Google

Any help with wiring in PLEASE

Odd-job wrote:Not too good when it comes to reading wiring diagrams

Odd-job wrote:Any help with wiring in PLEASE

If anyone was to find a wiring diagram to do what you ask, I don't see how it would help you if you are not good at reading them.

I don't really know what it is you are asking for if a wiring diagram won't help.

Odd-job wrote:I managed to do any bsi test was from help from people on this website YouTube and Google

So, you traced the fault to the BSI and proved the wiper motor is OK, great.

You need to have the BSI repaired. There is a hack to fix the power board in the BSI with a unmatched one from ebay. The topic is here. BUT this carries a lot of risk in stuffing up the BSI. BBA Reman do some BSI repairs if you send the BSI away.

You can do all sorts of damage to the car if you get the wiring wrong when making modifications, particularly with the BSI wiring because that controls the whole car. I wouldn't advice anyone who is not confident in understanding and checking wiring and wiring diagrams to make changes to the BSI wiring.