Smoken' hot fuse C8-Rgt Radiator Fan

[Mother]

Fan GURUS please apply!! Searched and did not find what I needed normanclature seems different. Well finally new engine in running good but during initial shack down lost my AC by burning out/melting the 40 amp fuse in C8 position which is "radiator fan right". This is phoenix so by noon in june it's 100 plus degrees, anyway I got home and after letting her sit over night and noticed that the AC works with fuse out? With AC off and the fuse "in" the fuse stays cool, but when I hit the AC Switch I hear which sems like 2 (drivers side fans) come on and the fuse heats up qwickly to the point that it starts to smoke and I shut engine off and pull fuse out. Any Ideas where to look first and I have not had a chance to hook up my durametric will this help me at all?

Edited June 15, 2008 by Mother

[Loren]

Chances are you have a bad ballast, stuck relay, or bad fan.

[Mother]

Chances are you have a bad ballast, stuck relay, or bad fan.

Thanks Loren,

Is the drivers side fan considered Fan 1? and can the balast be purchased seperatley?

19 Radiator Fan 1 - Setting 1 141 951 253 B

20 Radiator Fan 1 - Setting 2 141 951 253 B

21 Radiator Fan 2 - Setting 1 141 951 253 B

22 Radiator Fan 2 - Setting 2

[Loren]

Yes, fan 1 is the front left and fan 2 is front right.

and yes, the ballast can be changed by itself.

[Mother]

Yes, fan 1 is the front left and fan 2 is front right.

and yes, the ballast can be changed by itself.

OK this is what I have so far. Fuse still burning.

1. Fan spins freely no rubbing #1 fan

2. Changed with another ballast (wrecking yard) No Change still hot and fan seems to spin on high speed or faster then the #2 fan (passenger side).

3. Removed both fan #1 relays #19,20 No fans on and fuse still gets hot.

4. Just turn the ac switch on and now it gets hot (with relays removed).

Now it seems the fans are not the problem

As a note though the fan #1 fans comes on to a high speed where as the fan #2 stays on low with ac switch on- hope this does not confuse issue furthor.

[KevinMac]

Yes, fan 1 is the front left and fan 2 is front right.

and yes, the ballast can be changed by itself.

OK this is what I have so far. Fuse still burning.

1. Fan spins freely no rubbing #1 fan

2. Changed with another ballast (wrecking yard) No Change still hot and fan seems to spin on high speed or faster then the #2 fan (passenger side).

3. Removed both fan #1 relays #19,20 No fans on and fuse still gets hot.

4. Just turn the ac switch on and now it gets hot (with relays removed).

Now it seems the fans are not the problem

As a note though the fan #1 fans comes on to a high speed where as the fan #2 stays on low with ac switch on- hope this does not confuse issue furthor.

I suspect you have corrosion somewhere. It could be at the junction point where the wires come int the fuse box. Corrosion builds a heater circuit, and causes more current to flow. I have seen this on other cars.

[juniinc]

I would replace the fuse first, corroded/bad contact could casuse this,,,

could also be the bad ballast

[Mother]

I removed the fuse panel and inpected and looked good, but it turns out that the wire was getting hot leading me to believe it was a component causing the problem.

Pulled the passenger fan and it barley would turn.... bearings and overheating present, so put another in and it's works great so far and fuse is just warm now with 30 amp fuse. If can just get another 40 amp fuse somewhere checker just had up to 30 amps. Thanks everyone for your help learned allot especially that a fast turning fan does not mean that it is a problem.