heater blower circuit?

[lrgvanman]

Referring to my 1984 GL SW, I am attempting to locate that 20A glass fuse as my blower suddenly stopped working. All fuses visible in the fuse box are good and convey electricity. My unit does not have A/C, therefore, no relay. I found the jumper that Gloyale referred to, dismissing a relay and there is B+ at both ends of it. Locating the blower motor is being quite interesting as well but I haven't pulled the glove box yet so unknown if it is there.

Edited September 2, 2016 by lrgvanman

[lrgvanman]

Found my problem.

 

Thanks to Gloyale for pointing me in the right direction with this image.

 

<a href="http://s209.photobucket.com/user/Gloyale/media/IMG_0192_zps09c006bc.jpg.html" target="_blank"><img

src="http://i209.photobucket.com/albums/bb29/Gloyale/IMG_0192_zps09c006bc.jpg" border="0" alt="A/C jumper EA81 photo IMG_0192_zps09c006bc.jpg"/></a>

 

This particular relay lives mounted directly above the fuse box on the drivers side.

To get to it pull the fuse box with 2 screws. Then pull the bracket with 1 screw and bend it down. Vola!

 

Even though the Fan had power from the AC circuit it would not run. ( I still don't know why. )

 

The glass fuse in my fusable link was rated 20 amps same as the blade fuse in the box. They are so close to one another I'm tempted to bypass it. It looks like my white wires got hot due to a bad connection.

 

I'm not sure of its purpose.

Any one else had trouble with this fuseable link?

I only wish I could find that glass fuse as all else seems good. There should be no relay because the jumper is there and this car has no A/C. I also have B+ at either end of the adapter/jumper/relay bypass or whatever it may be called.

Edited September 2, 2016 by lrgvanman

[Moto7man]

On 12/19/2013 at 12:58 PM, Gloyale said:

 

Your not understanding relays.

 

The Blue/red is 12v from fuse box, to the relay. 

The Green/white is 12v out to the fan when the relay closes.

 

The Red/yellow wire should be 12v signal when key is turned on. From fuse 12 15amp.   If key is off, this wire has no power, and the relay is open so no power goes out the Green/white.

 

The last wire should be Red/white.  This wire should have ground.  Non A/C ground all the time........A/C models ground only when one of the mode select switches is depressed (heat/vent/defrost/etc..)

 

Sounds like you either have no power to Red/yellow or no ground on the Red/white.

 

This means the relay never closes.  fix that and the relay will work.

 

Then replace your blower resistor because your 1 and 2 speeds are burned out.

Sounds to me like the power is not getting to the trigger wire with Key on. 

91 loyale with AC. I don't have power with red yellow wire mentioned above. I checked the fuses and fusable link.Installed a new relay and blower motor runs fine just doesn't shut off with the key in the off position. Any ideas on what to check on the red yellow wire?

[Moto7man]

Bump