Heater fan No power.
09-21-2016, 04:38 PM
#1
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Join Date: 10-14-2012
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Heater fan No power.
I have a 2008 pannel.
Today the heater fan quit. This is what I've done so far. I ran a wire from the battery to the brown wire on the blower motor. Every thing works great, all speeds for the fan work. So thinking I have a bad relay or fuse I replaced the HVAC relay and the fuse for the BCM #4 the 30A one under the hood. The fan still does not work, but if I hook up the jumper wire from the battery to the brown wire on the fan life is good. Every thing else on the car still works.
Could the BCM have died?
Today the heater fan quit. This is what I've done so far. I ran a wire from the battery to the brown wire on the blower motor. Every thing works great, all speeds for the fan work. So thinking I have a bad relay or fuse I replaced the HVAC relay and the fuse for the BCM #4 the 30A one under the hood. The fan still does not work, but if I hook up the jumper wire from the battery to the brown wire on the fan life is good. Every thing else on the car still works.
Could the BCM have died?
09-22-2016, 08:51 AM
#3
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Replaced the #30 relay in the BCM and the #4 30a fuse in the under hood fuse box already. Still the fan sill not work unless I use a jumper wire. When I do I have all speeds on the fan.
09-22-2016, 10:22 AM
#4
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I am assuming you have verified power at the relay with a VOM. Just replacing things won't test that.
Then continuity from the relay to X210, then continuity from X210 to the fan, the ground to the motor. Also S203 the splice, sometimes they throw a fusible link in them. G203 is the ground behind the left side of the dash.
They changed the nomenclature between years X210 and C210 are the same connector.
Then continuity from the relay to X210, then continuity from X210 to the fan, the ground to the motor. Also S203 the splice, sometimes they throw a fusible link in them. G203 is the ground behind the left side of the dash.
They changed the nomenclature between years X210 and C210 are the same connector.
09-22-2016, 10:28 AM
#5
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Location: Alabama
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Looking at the diagram, the brown wire goes straight from relay #30 to the fan motor.
I think you need to check at the relay and see if that wire coming off the relay has power. If it does, then it would have to be a break or bad connection somewhere in that brown wire run.
Notice the diagram does show a connection or link(X210) in that brown wire.
I think you need to check at the relay and see if that wire coming off the relay has power. If it does, then it would have to be a break or bad connection somewhere in that brown wire run.
Notice the diagram does show a connection or link(X210) in that brown wire.
09-22-2016, 12:57 PM
#6
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Join Date: 10-14-2012
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The plot thickens.
The wire coming off the relay(pin 87) on the BCM has 12v. At X210 no volts. The ground has continuity from the motor to the blower motor switch.
So it looks like I may have a broken brown wire.
The wire coming off the relay(pin 87) on the BCM has 12v. At X210 no volts. The ground has continuity from the motor to the blower motor switch.
So it looks like I may have a broken brown wire.
09-23-2016, 11:16 AM
#10
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Then the wire is broken somewhere between the relay and the motor. Notice I said relay, not fuse box. Could be inside the fuse box.
Has anyone spliced any wires in? As far as I can tell it is a straight wire from the fuse box to S203. A pretty short one. I think S203 is where the ground wire gets into the cable to go to X/C210.
Has anyone spliced any wires in? As far as I can tell it is a straight wire from the fuse box to S203. A pretty short one. I think S203 is where the ground wire gets into the cable to go to X/C210.