Hubie

No power at pin 9 black/brown. About 33 ohms to grnd.

Pin 7? blue/white, no power, about 60 ohms to grnd.

Pin 6? I'm sorta blue/black color blind, but I think it is brown. very little resistance to ground, maybe .06 ohms, probably a good ground, just reading the resistance to my ground connection. It roams around a bit, reading the highest at about 14 ohms.

Hubie

With C209 connected, I have 12volts at pin 87 of the relay socket, key off and on.

Hubie

Pin 30 of the relay reads about 500 ohms to ground.

CCKen

Man, you're all over the place. Are you sure you have the C209 connector oriented properly when you look at it compared to the pin layout in the schematic!?

There is no pin 6 on the schematic.

CCKen

Are you sure it's pin cavity 87 and not pin cavity 30? Pin cav 30 (Red/Light Green tracer wire) would get 12 volts from the battery at any time. It would be impossible to get 12 volts at 87 unless you had the relay plugged in and you were back probing pin 87 (Dark Green wire).

Hubie

??

Pin socket 30 is all by itself, correct? If so, I'm reading that right. I pulled the relay and looked at the bottom to get the relay pin numbers. Maybe I'm getting things backwards. I'll go check again. Can I PM you pictures? i don't think I have permission to post any.

CCKen

Look at the schematic. It shows the pin cavity locations in the relay connector.

CCKen

I must ask...

You do have the Mode Selector in any selection but OFF (O) when you try the fan don't you"

Hubie

Ha! yes. I'd kill myself if I hadn't. That would have been classic. "Sir, the motor doesn't run in the O-F-F position?

Hubie

I'm going to try to post a couple of pics of what I'm reading.

Hubie

On the 12vdc scale, socket 87 is reading 12.10vdc key on or off.

87a is not used. correct?

Not sure why socket 30 is reading a tenth of a volt with the key on and nothing with the key off.

I'm suspecting there are some melted wires in a plug somewhere to be getting these readings?

Fred/N0AZZ

After reading your original post I do have a general comment (not just the blower motor).

20 some odd years ago I bought 2 4WD's a 2 year old 3/4 Ton Chevy PU and a 1 year old Town Car at a Insurance Auction. They supplied little information but from what I saw they had water damage/sumerged whatever. But both showed little to zero damage except would not start. Well I had the winning bid that is where my problems started.

All things electrical were screwed up in one way or another, your XJ could have been in a creek or shallow river where a lot of these things got wet. Then as time went by for some rust, grounds, shorts developed. With as many different things affected as you stated really makes me wonder. I may be way be way off base but something I have firsthand knowledge of trying to repair.

Hubie

maybe I'm reading the drawing wrong, but shouldn't there be 12vdc at relay pin 30 all the time? Shouldn't relay pin 87 have a resistance to ground and Ovdc with the relay out? I thought Relay #30 got 12vdc directly from PDC6.

Hubie

That is a distinct possibility. I may have to search the VIN. We had Superstorm Sandy up here a few years ago now.

CCKen

Pin 87 to ground is reading through the blower motor, then through the blower speed switch (resistance would depend on which speed selection was made), then through the mode selector to ground at G108. 87 should have no voltage.

With the mode selector in defrost, read from 87 to a bare spot on the dash structure, while making the 4 different blower speed selections and see what each selection resistance is. 4 should be the lowest and 1 should be the highest resistance.

Pin 30 should have battery voltage any time.