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85 W150 intermittent heater issue


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hahaha ya i could understand that. i don't know much about repairing the systems but i would guess it requires ...


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Old 01-20-2017, 09:57 PM   #21 (permalink)
 
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hahaha ya i could understand that. i don't know much about repairing the systems but i would guess it requires replacing pretty much all the seals in the system and recharging it if that is the issue with yours.


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Old 01-21-2017, 06:14 PM   #22 (permalink)
 
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Wolfe, do I pop the fuse out and check across those terminals ??
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Old 01-21-2017, 06:18 PM   #23 (permalink)
 
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popping the fuse out might make it easy to get a good reading. 1 side or the other should have 12v with the key in the run position.


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Old 01-21-2017, 06:30 PM   #24 (permalink)
 
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So it doesn't skew the potential problem by removing the fuse, to check across the fuse terminals.
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Old 01-21-2017, 06:49 PM   #25 (permalink)
 
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Good voltage at the fuse panel. I checked at the blower motor resistor, seems one terminal had 5v and the other 12v. And then there was a single terminal, don't know what it was (see pic)
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Old 01-21-2017, 07:19 PM   #26 (permalink)
 
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Well that's the resistor. I checked at the connector to this. Like dsexpress said the other day, it might be this sucker. Gonna replace it tomorrow (had to order) and see if it is so.
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Old 01-21-2017, 07:22 PM   #27 (permalink)
 
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do you know what color the wires were that had power? you can try pulling it out to see if there is any issues with it.


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Old 01-21-2017, 07:41 PM   #28 (permalink)
 
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I don't know. I was just excited there was power on that side of the resistor.
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Old 01-22-2017, 01:56 AM   #29 (permalink)
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It could be a bad fan switch. I have had many burn out (some melted some). I always grabbed a couple when junkyarding.
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Old 01-22-2017, 10:04 AM   #30 (permalink)
 
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Wolfie,

You asked which pairs had what voltage. Hers is a pic.

The white/blue are the ones that had 5v
The brown/dark green had 12v

And that single green had nothing. But possibly I did t have it grounded well enuf when I took the reading ?
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