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Unread 02-25-2015, 04:55 PM   #1
quedog
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1996 XJ Cherokee 
 
Join Date: Feb 2015
Posts: 9
1.5 v to ground on Blower motor

why would I have 1.5 v on the ground wire from the blower motor fan plug connector to the fender

with key on ...I get 1.5 vdc to ground...
with key off... .5 vdc to ground

any help would be a great help,


Last edited by quedog; Yesterday at 12:06 PM..
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Unread 02-25-2015, 08:34 PM   #2
chris87xj
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I didn't quite understand your question.
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Unread 02-25-2015, 09:04 PM   #3
quedog
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1996 XJ Cherokee 
 
Join Date: Feb 2015
Posts: 9
sorry about that,
the question is why would I a 1.5 v on the ground wire from the blower motor fan plug connector.

I have the blower motor issue not like many others, I had blower motor fan running but at low speed, (very low speed) figured bad motor, checked the motor to the battery and fan ran fine, so into the dash and check wires and fix or replace anything I found bad, well nothing.. things looked ok, so went to the resistor pack and it checked ok,, so I took it all out... cleaned and rechecked .. all good connections, so I jumped the 12v line from the heat control in the dash to the green wire from the resistor pack and still low fan speed, but yet at the plug I was getting a good 12v, .. ok maybe bad ground.. so spliced in to the ground wire and got high speed fan...
but also got a good spark when doing it.... so I checked to see and sure enough their was a + voltage on ground 1.5v, so I disconnected my jumper wire removed all switches and controls to the heater wiring ... and still have the 1.5 voltage, if I turn the key off I get I still have .5v to ground. pulled all the fuses and relays and the best I could find was the 10A red one closest to the relays would drop it from the 1.5 to the .5, kind of stumped on what to check next.

any suggestions
thank you
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Unread 02-25-2015, 09:44 PM   #4
quedog
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the wiring diagram I was looking at for my ground issue
wp1.jpg  
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