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Old 08-17-2019, 06:35 AM
jcisworthy jcisworthy is offline
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Heater Blower Motor

No power to the blower motor switch in my 1986 J20

All fuses good, any ideas?
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  #2  
Old 08-17-2019, 07:17 AM
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babywag babywag is offline
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There is a relay buried in circuit on '86-up could be culprit?

oljeep.com has wiring diagrams if needed
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Old 08-17-2019, 07:22 AM
jcisworthy jcisworthy is offline
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I found one relay under the switch in easy reach and swapped a good one I had here and no power.

Not sure if that was the correct one it was the low hanging fruit I had easy access to

I will look for others under the dash
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Old 08-17-2019, 07:29 AM
jcisworthy jcisworthy is offline
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That relay looks like the correct one based on wire colors and there is no power to that relay

Is there a fusible link wire in that circuit?
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  #5  
Old 08-19-2019, 10:31 AM
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tgreese tgreese is offline
 
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It would be on the wiring diagram. http://oljeep.com/gw/elec/86/86_FSJ_...ramPage3-3.gif

Looks like a thermal fuse on the resistor stack. Seems more likely. Use your multimeter to test. Don't flail, read the diagram and measure.
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Last edited by tgreese : 08-19-2019 at 10:38 AM.
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  #6  
Old 08-28-2019, 06:05 AM
jcisworthy jcisworthy is offline
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It was the fuse on the thermal relay. I fixed it yesterday.

Thank you for the replies.
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