71Vettehead

The wippers just stoped working! The crowe (sp?) still lifts up but the wipers no worky! Is there somwhere easy to start looking at? Is this a commen troulbe with a 71?

TIA!

rihwoods

....wiper motor circuit needs checking..not sure,but think there is an interlock (switch) from vacuum side to electric motor...??? Check fuse first...

71Vettehead

Thanks, I'm heading out to work on it now. I'll let you know what (if) I find.

71Vettehead

Found the interlocking switch. But found no voltage on either side of it at all!? Only one wire with voltage to it heading to the motor. Its the lighte green one towards the driver side. Its a 3 wire plug. Life is woul;d be so easy if I had a wiring digram for this beast!

zigvs

I bought my 73 and the guy said the wipers didn't work.I sprayed WD 40 on all the linkages and gave it a wiggle and they work fine.Its a cheap thing to check out.

c3dreamer

A. Check the following ("easy way"):

1. Check 25 Amps fuse located in fuse block. Replace it if necessary.
2. Check black wire condition of wiper switch. It made ground. Check if it is loose or if connector is corroded.
3. Check wire connections of wiper switch and wiper motor. Check if they are loose.
4. Check wiper motor ground. A black wire is responsible to made ground. Check if it is loose or connector corroded.
5. Wiper switch wires are 4: One black (ground), one white, one light blue and one orange. Except the black wire, the other three run to a common independent connection. Check if wire connections are loose or corroded.
6. Wiper motor has 3 main wires: one red, one tan and one black. Black wire is connected to ground and also run to a common connector. Tan wire and red wire run to a common independent connector also. Check connections if are loose or corroded.

From wiper motor:

a. From common connector described in point 6, red wire is connected to a light blue wire. Tan wire is connected to a yellow wire. Black wire is connected to a black and orange wire. Check connections if are loose or corroded.
b. Light blue wire run to a common connector located approximately in fire wall and is connected to light blue wire described in point 5 and related to wiper switch. Check connections if are loose or corroded.

c. Yellow wire run to a common connector located in firewall and continue the run to 25 Amp located in fuse block. Check connections if are loose or corroded.

d. A second yellow wire run to wiper water pump wire connection of the same color. Check connections if are loose or corroded.

e. Black and orange wire run to a common connector located in firewall and continue to run to another common connector, now as an orange wire of the wiper switch. Check connections if are loose or corroded.

B. Complete "Hard Way"

1. Perform continuity test, volt testing, find for open circuit, find for short circuit for described wiring and components. Use voltmeter and other electrical testers.

c3dreamer

Check also:

http://forums.corvetteforum.com/show....php?t=1382921