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Old 08-08-2016, 01:20 PM
kerley kerley is offline
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Default A/C fuses

Went out this morning and my truck started as it should but no air conditioner. It worked as it should when I parked it, now nothing. Owner's Manual shows #5 fuse slot 5amp fuse, the fuse is good, no A/C and the fan does not work, is there something that I am missing?
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Old 08-08-2016, 01:44 PM
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79jasper 79jasper is offline
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What year?
I recall some having issues with the blower assembly.

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Old 08-08-2016, 08:19 PM
kerley kerley is offline
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79jasper,
Thank you for your reply. I spent most of the day researching the system. What is puzzling me is it worked as it should when I shut it down last Friday afternoon. She started up this morning as she should, but no A/C. No matter where I set the fan speed switch, nothing, just dead.
That indicates wiring or dead fuse. All fuses in the fuse box are good, so I opened the hood to check the Black fuse box. I pulled the Blower Motor Relay and the forty amp Blower Motor Fuse. Tomorrow I will go to town and replace both with new and see what happens. If the fuses don't solve the problem I will test the Blower Motor Resistor.
Kerley
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Old 08-09-2016, 05:49 AM
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You are saying just the blower does not work? You could just swap relays around for the blower and something else to see if that is your problem. Far as the resistor, even if it did fail you would normally have high speed. I would check for power at the blower motor with a test light and work my way back until I figured out where the power stops. It could even be the switch on the dash.
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Old 08-09-2016, 07:04 AM
kerley kerley is offline
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Thank you
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Old 08-09-2016, 03:39 PM
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Something else that seems to be a common issue with the blower motors is the connection at the blower motor. They have a tendency to loose connection. If you still don't have a blower something else that happens is an ignition switch problem. We won't get into that unless you need it.
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Old 08-09-2016, 03:58 PM
kerley kerley is offline
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I picked up some new forty amp fuses and relay this morning for the under hood Black Box and checked voltage, all hot as it should be but still no blower motor response. After reading and viewing Youtube video's I just ordered a new Blower Motor and Relay from Rock Auto. That way all bases should be covered. I still need to repair the fuel gauge, all in due time
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