I back probed the one I replaced. Never above like 16 volts. When it cutout, like 2v.

 

16V, you have an alternator issue.

George

 

Walk me thru checking new blower please

 

With the truck running:

Voltage across the battery terminals

Voltage across the positive and negative blower wires as close to the motor as possible under full load

Same thing but move the negative probe to a good clean frame ground

Amperage if you have a meter. If clamp on then clamp anywhere on the power wire, full load.

George

 

Back probing with other probe at bat negative. 11 12 volts

 

Across bat 14
Across wires. 11
frame 11
No clamp

 

If these numbers are at full load then you don't have a ground problem.

What was melting before?

Do you have an ammeter function on your meter? If so try to get a current reading inline under full load if you have a 10A scale

George

 

The relay melted. I checked my old post. The high speed wasnt working.


Here is what i have. Clamp seems to not work for vehicle power unless im misunderstanding it.

 

Is it just me, or is that switch to the "off" position...

 

When I took pic. Yes