Wiper motor wiring question

Tommy Fain · Jan 8, 2020

Working on 69 Roadrunner wiper motor. Everything is working, but the blue wire coming from the switch going to the bulkhead has been hot at some time. When I check, I am getting power to this wire at all times when the key switch is on- wiper switch off, switch on low or switch on high, always hot.
Key switch off, not hot.
I disconnected this wire and the motor will still run
My question is: should this wire be hot at all settings with the ignition switch on, or is something shorting out?
Thanks.

Rich B · Jan 9, 2020

This may help:

Rich B · Jan 9, 2020

Brush up after looking at above schematic lmao. https://www.hotrod.com/articles/mopp-1110-ballast-resistor-guide-ballast-blast-off/

Tommy Fain · Jan 10, 2020

I have all the schematics. Even ordered a larger print so it would be easier to read. And I understand the resistor. But I don't understand why the blue wire coming off the wiper switch is hot at all times, key on or key off makes no difference. This wire runs to the bulkhead (H) and out to the wiper motor. If I disconnect this wire the wiper motor will still run, so is this wire necessary? I'm sorry if I'm not explaining this very well.

oscar holland · Jan 25, 2020

Has it anything to do with the home switsch of the windshield wipers......

Russ69Runner · Jan 25, 2020

When you disconnect that blue wire dose the dome light and console light go all the way off. May be you found the problem their. Must be something in the bulk head shorting out to another wire possible.

Tommy Fain · Jan 28, 2020

Put a new wire in the bulkhead and changed the terminals on both sides. Everything working good now.
Thanks everyone for your input.

Russ69Runner · Jan 29, 2020

Problem fixed!!! Know this makes you a happy camper Tommy. Something simple can drive you up the wall. Glad it all worked out buddy. :thumbsup2:

Wiper motor wiring question

Tommy Fain

Member

Rich B

Well-Known Member

Rich B

Well-Known Member

Tommy Fain

Member

oscar holland

Well-Known Member

Russ69Runner

Well-Known Member

Tommy Fain

Member

Russ69Runner

Well-Known Member