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AC/heater control board

Tiny
NRUXS05
  • MEMBER
  • 2000 JEEP GRAND CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
I had a problem a while ago but got a temp fix and I use to jump the two connectors and the fan would come on but wouldnt shut off with the car so I added a toggle switch then one day it failed all together no power what so ever
Tuesday, April 5th, 2016 AT 7:35 AM

8 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
So what is question?
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Tuesday, April 5th, 2016 AT 9:42 AM
Tiny
NRUXS05
  • MEMBER
  • 5 POSTS
It doesnt work now what can be the problem
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Tuesday, April 5th, 2016 AT 11:42 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check to see if the relay under hood is any good and check for a burnt wire harness because you jumped the wires
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Tuesday, April 5th, 2016 AT 12:08 PM
Tiny
NRUXS05
  • MEMBER
  • 5 POSTS
Fues relays all good harnesses arent burnt?
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Tuesday, April 5th, 2016 AT 1:05 PM
Tiny
NRUXS05
  • MEMBER
  • 5 POSTS
Yes everything is ok I mean what other fuses are there and then there is supposply a inline blower motor relay and dont know where that is
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Tuesday, April 5th, 2016 AT 1:51 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There is no relay for blower only a 40a fuse in power dist center by battery. If it still doesn't work after replacing fuse have it scanned for codes it may be a body module or heater module issue. Also if it works on high but nothing else check blower resistor by blower.
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Tuesday, April 5th, 2016 AT 3:05 PM
Tiny
NRUXS05
  • MEMBER
  • 5 POSTS
Doesnt work at all even with manual temp control it can give codes
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Tuesday, April 5th, 2016 AT 4:21 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Fuse 20 on inside fuse panel supplies power if that fuse is good see if the whtk/pink wire leading to control panel has power if it does then your control head or body module have been damaged from you jumping the power to make blower work. You can check the lt grn and lt blu wires coming out for speeds 1&2 if using a test light you will have to use the positive side to act as ground on those circuits
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Tuesday, April 5th, 2016 AT 4:39 PM

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