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Old 01-14-2014, 10:28 AM
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Exclamation Electrical/Heating Issue

Hey everyone so every time I start my truck I have no heat at all. The air bag light is on and the passenger air bag light saying it is off does not come on either. After I let the truck run for maybe an hour the lights change and the heat kicks on. Any ideas what it could be? Thank you for the help!!
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Old 01-14-2014, 04:16 PM
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You mean the heater Fan - right?

It doesn't run unless the indicator light for the AB goes off?

Also, what Yr/Mdl truck are we talking about?
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Old 01-14-2014, 05:48 PM
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Yea that's correct.

It's a 2000 F250
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Old 01-16-2014, 12:53 PM
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Any ideas?? All of my fuses are good. Could it possibly be a relay?
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Old 01-16-2014, 01:04 PM
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Please fill out your sig with info on your truck.

Around 01 there were significant wiring changes done to these trucks and with a problem like this it may be hard to point you in the right direction without knowing which wiring setup you have.

Anyway so what exactly happens?

Passenger airbag light doesn't turn on when it should be?
Airbag light on the dash-- what's it doing?
And you have heat, but no fan... Right?
Then after a while the fan starts working and passenger airbag lights turns on?

Is that right?
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Old 01-16-2014, 01:21 PM
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So on start up in temps below 30 degrees the dash airbag light comes on and I have heat, but no fan. If I let it run for maybe an hour prior to driving it the dash light will go off and the fan will be working. When the fan kicks on and the dash light goes off the passenger light signaling that the airbag is off comes on like normal.

I will add my truck info to the signature, but it is a 2000 F250.
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Old 01-16-2014, 01:27 PM
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Well then... I think your best bet is to find out what that airbag code is for starters.
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Old 01-16-2014, 01:29 PM
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Alright sounds good. I will do that. Will a basic scan tool show that code?
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Old 01-16-2014, 01:46 PM
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I think it actually will, but I can't be sure as I've never tried.
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Old 01-17-2014, 07:01 PM
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Get a wiring diagram, look for shared power and grounds between the fan and air bags. You'll be surprised the tricks bad or dirty grounds can play.
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air bag, electrical, heat

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