Windscreen Wiper Problem (1 Viewer)

[tlc_4play]

Widscreen Wiper Problem

Driving home on Friday in one of the infamous African thunderstorms (2" of rain in 1hr) and the windscreen wipers died on me AAARRGGHH .
Once home I discovered that there was no 12V to the power supply wire to the motor, so I hot wired a 12V wire from fuse to motor terminal, but, now the wipers are only one speed slow and Ive checked everything, even to the point of swopping the two motor brush connections (which gives the motor its 2 speeds) but I still end up with only one speed ~ SLOW . However the return to park function still works .

So it would appear as if one of the brushes in the motor is toast and I am almost certain that there are no spares/brushes available for the wiper motor

Has anybody else had a similar problem and is my analisys correct

- now to find a new or working used windscreen wiper motor.

 

[Coolerman]

It would be more likely that you have a blown fuse, bad ground, defective switch, or bad connection somewhere in the circuit. If you lost the +12V I would check the fuse first, then clean the fuse clips. Next check the harness connections. Something could have come unplugged.

 

[tlc_4play]

ELECTRICKERY 101 ~ always check the fuse first - it was OK

Checked the switch - it was OK. Sprayed with Q20

Only two plugs in the harness for the wiper circuit - one into the wiper switch and the other into the wiper motor all checked, cleaned and then sprayed with Q20

The 12V feed wire must be broken somewhere

 

[Coolerman]

Mulit-meter/test light time!

Don't know about your 79, but on a 71 the +12V is a solid blue wire. This wire comes from the fuse block, to a bullet connector under the dash, then the other end goes to the harness going up to the windshield to the motor.

Good luck!

 

[tlc_4play]

Yes - the solid blue is the 12V supply wire

I will try a used wiper motor from a 45 to see if I get two speeds, if not - like you say then its 12V test light time

Thanx