Derrick Reynolds

I think this is a case of a picture is worth a thousand words. Here is one:



It is easy to see a black wire coming from the area of the yellow-green-blue connection that is not connected (it has a red splice in it). This wire tests no voltage to ground, and less than 1 ohm of resistance to ground. Further down in the picture, there is a brown wire coming out of the body of the wiper motor with a stripped end, also not connected to anything. This wire tests hot (12.8 volts potential difference to ground) even with the ignition switch off, and the key removed. At one point, these two were connected, creating a short that drained my battery, so I feel that mystery is solved.

However, I still can't figure out to what those wires should be connected? Also, the Willcox diagrams show a 5 pin wiper relay, and it appears that my relay is only 3 pin.

any guidance here is greatly appreciated!

Derrick Reynolds

Alan:

Sorry I missed this, and thanks for the reply. That ground is part of the ignition harness that I replaced last year. It is there, and brand new looking like yours!

Upon further inspection, there are two wires coming out of the body of the wiper motor. One goes into the head of the wiper motor next to the 3 way connector, visible in the picture. I believe this is a ground wire that is supposed to be there, but it looks like some Bubba spliced another connection into it, which is the wire we see floating in the picture. The other wire coming out of the body is more brownish, has voltage all the time, and I can't figure out where it goes from the diagrams above.

On your wiper relay, how many terminals do you have? Mine has 3, and looks old as the hills (visible in the phot) so I suspect original.
The diagram from Willcox seems to show a 5 terminal relay.

Any and all help is appreciated. FWIW, I started replacing wiring harnesses because Bubba has been hard at work on my electrical system over the decades. I take nothing I see on my car to be "correct". My fears were well-founded on the blower motor problem, as the issue was caused by an incorrect 4 terminal relay being installed, when a 5 terminal one was correct.

Derrick Reynolds

Correct. I had some wires connected incorrectly, and found a low-amperage short. This is what killed my battery over the course of a few days. I don't see any more shorts, but having 2 blower motor fuses blow in the last year has me keeping my eyes open.

I think I did this, but I wouldn't be surprised if I got it wrong. The yellow wire is hot whenever the wiper switch is on. The green and blue wires never get voltage, and are grounds of differing resistance. I think this is correct for these three wires. I tested the two coming from the body of the motor, one is hot, the other ground. I am not sure where these need to get connected.

No fusible links blown . . . .yet. One of the reasons I decided to replace two wiring harnesses is that they old ones were Bubbatized greatly. One of the wires that should have had a fusible link, didn't have one. It does now.

Thanks for the help. Maybe with the additional information above, we can figure out where my wires need to go!

Derrick Reynolds

I want to bump this back up. Can someone PLEASE look at their '70 or thereabouts car and tell me where the two wires coming from the body of the wiper motor go? I can't seem to figure it out looking at the diagrams.

Thanks.

Derrick Reynolds

No help? Really? Would an offer of a beer get someone to take a pic?

Rescue Rogers

Sorry I canrt help, ive got a 68. Did you try doc rebuilds ez wiring diagrams. Or wilcox?