1998 Dodge Caravan AC wont turn on

Tiny
VMACKELL
  • MEMBER
  • 1998 DODGE CARAVAN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 259,000 MILES
The AC will work if I activate the ac relay ( I usualy wrap a rubber band around the relay when its really hot ) but will not turn on when I activate the switch, although the light comes on and the blower runs. I've checked all thre fuses and replaced the relay, Thinking maybe a PCM or ac heater control module, or something in between?
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Saturday, May 16th, 2009 AT 3:49 PM

3 Replies

Tiny
MERLIN2021
  • EXPERT
Battery been replaced recently? If so try this.
Shop: WALES GARAGE GOODYEAR
Date: 7/18/2008 5:58:23 AM

When Battery replaced you must recal the a/c body module or rear wiper system lights will flash and a/c will not cool the van properly. You will find the procedures in the a/c section of the test and diagnostics.

The prcedure is simple.

1 Key off (note a/c can not have been on or system will not Calibrate) the evap must be warm!

2 Set Blower to High.

3 Set mode door switch to panel( Big arrow pointing to main dash outlets)

4 Set temp to COLD (slider switch)

5 Push rear wiper and wash buttons at same time turn on the ignition to run, hold till (DO NOT START)

6 All LEDS LIGHT UP for 5 Secounds System is now in test mode! Release the butons

7. When system is finished runing test it will START flashing the the rear wiper led only.

8 Start and run a/c system to check functions of blend doors and defrost systems!

9 After the test clear your nose and throat to remove any airborne spores you just sucked in!

10 NEXT JOB BOSS!
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Sunday, May 17th, 2009 AT 7:58 AM
Tiny
VMACKELL
  • MEMBER
I tried your suggestion, but it did not fix the problem, after going into test mode the console flashes the
rear wiper led 1 time,
then the intermittent light 5 times,
the rear wiper 1 time,
the intermittent led 6 times,
then repeats.
Any other suggestions.
Very hot in california,
vince
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Monday, May 18th, 2009 AT 3:04 PM
Tiny
MERLIN2021
  • EXPERT
Did you test that switch? May not be signaling the pCM to ground the relay.
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Thursday, May 21st, 2009 AT 2:22 AM

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