3 speed wiper help please! (wiper Guru needed)

[KitCarlson]

Yes, but looking at contacts open and close is different than using a multi-meter and looking for change of state.

Powered contacts will have voltage across them when open, and go to low voltage when closed.

Check grounds with meter, by measuring back to battery (-). Voltage should be near zero.

Rivets are sometimes used to attach contacts to wiring or terminals, they can oxidize and make open connections too.

Good sharp probes really help, most cheap meters have cheep iffy probes. Learning to probe around with meter, helps with fixing success. Use meter to investigate all points and connections.

A thin strip of new printer paper carefully pulled through contacts can clean them. Be careful not to bend them.

Small clean stainless steel brushes help clean male Fast-on terminals. Female Fast-on terminals get brittle, and loose grip. Fast-on terminals are only rated for a few plug cycles (3-5). Bulkhead terminals troublesome in our old cars.

 

[moparmandan]

Yes, but looking at contacts open and close is different than using a multi-meter and looking for change of state.

Powered contacts will have voltage across them when open, and go to low voltage when closed.

Check grounds with meter, by measuring back to battery (-). Voltage should be near zero.

Rivets are sometimes used to attach contacts to wiring or terminals, they can oxidize and make open connections too.

Good sharp probes really help, most cheap meters have cheep iffy probes. Learning to probe around with meter, helps with fixing success. Use meter to investigate all points and connections.

A thin strip of new printer paper carefully pulled through contacts can clean them. Be careful not to bend them.

Small clean stainless steel brushes help clean male Fast-on terminals. Female Fast-on terminals get brittle, and loose grip. Fast-on terminals are only rated for a few plug cycles (3-5). Bulkhead terminals troublesome in our old cars.

Thank-you sir! Just to give you a little insight into my electrical/electronics background, it started in 1981 in the Navy electronics programs and continues through today in the aerospace industry. So the electrical test and repair part of this is not over my head. Not bragging at all, just letting you know, so you don't have to wonder if you need to give me the absolute basics of electrical troubleshooting and repair. That said, I have little experience with these wiper motors.
I'm working on changing that

Thank you much for sharing your knowledge and help!
BTW I deleted the bulkhead connector some time ago, because they are so troublesome. And
my meter is a Fluke 87 with good probes.