4 replies to this topic

[jiminwatford]

Obviously presumably some loose / poor connection but today the wipers stopped working with the engine running. With just the ignition on they're fine but with the engine running they don't work

 

I fiddled about with the fuses and wiring but nothing seemed broken 

 

Everything else seems to be working

[Quinlan minor]

Loose contact in the switch, possibly?

[jiminwatford]

Yeah it just seems odd that they work fine until the engine is on. But i agree it seems like a loose connection. I'm just wondering what difference it makes to these electrical systems when the engine is on as opposed to just the ignition

[Steam]

Try them with the ign switch in various positions rather than with engine running to prove switch. Then it may be a case of testing voltages at points in the wiper wiring to eliminate /prove.
If it is not just a vibration/ loose connection issue then the alternator may be at fault.
Does it have relays for them ie spi / mpi?

Edited by Steam, 02 March 2024 - 03:10 AM.

[bpirie1000]

Fuse 5and 6 relates to wipers.

Check the connections are not corroded all up.

This is usually the issue. Back of the fusebox usually has some rust on connections.(heater blower /washer pump on same fuse) The engine running vibrations break the connection could be a case of new fuse box. Or just a tighten of a crimp connection..

Would also say that the block into the wiper suffers the same issue..

Remove both and check the continuity.

Just to make it more complicated. I trust you have checked the splines on the wipermarm mounts. These can wear and
the splines come off. Giving smooth mounting points. But unlikely since they work when not running.