A-C

Tiny
AIRNUT
  • MEMBER
  • 2001 FORD FIVE HUNDRED
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 106,000 MILES
'01 Ford Mustang 3.8v6. AC quit. Have 13.2v to low pressure switch, 0v to ac clutch. Have bypassed low and high pressure switchs and clutch will not engage. Clutch will engage if I jump directly to battery. Any ideas? Mark
Do you
have the same problem?
Yes
No
Saturday, June 4th, 2011 AT 7:08 PM

18 Replies

Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
Looking at a schmatic, the only idea I have is possibly the constant control relay module. Have no idea where it is located or how to test it. Have checked fuse no. 23 on inside panel and fuse no. 24 in engine compartment
Was this
answer
helpful?
Yes
No
Saturday, June 4th, 2011 AT 7:16 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the wiring to the clutch could be open-continuity test
Was this
answer
helpful?
Yes
No
Saturday, June 4th, 2011 AT 7:19 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Looking at the database, I don't see a 500 made here until 2005.
Was this
answer
helpful?
Yes
No
Saturday, June 4th, 2011 AT 7:39 PM
Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
Wrenchtech, its not a 500. Regular Mustang 3.8 v6
Was this
answer
helpful?
Yes
No
Saturday, June 4th, 2011 AT 11:05 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
I see, wrong category. I don't know where you got your fuse numbers from but the inside fuse is #2 and the outside fuse should be labeled A/C pressure. I'm finding no info on the location of the CCRM but they can be mounted near the battery, the headlights or the strut tower. The 98 Mustang has it on the right fender well, next to the air filter. I attached a picture of it. Test for ground on the Pink/yellow wire at the CCRM to know if the PCM is commanding it on.
Was this
answer
helpful?
Yes
No
Saturday, June 4th, 2011 AT 11:26 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
I see now where you got the fuse numbers. They supply the control head. The ones I gave you supply the compressor.
Was this
answer
helpful?
Yes
No
Saturday, June 4th, 2011 AT 11:30 PM
Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
Checked all fuses on inside panel as well as panel under hood, all are good. Why would I have power at the clutch cycling pressure switch, but no power at the clutch?
Was this
answer
helpful?
Yes
No
Sunday, June 5th, 2011 AT 12:57 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Because that circuit doesn't go to the clutch. Please test for ground at the CCRM as I asked.
Was this
answer
helpful?
Yes
No
Sunday, June 5th, 2011 AT 12:59 AM
Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
Hang in there, I'am having a rough time locating the CCRM.
Was this
answer
helpful?
Yes
No
Sunday, June 5th, 2011 AT 1:23 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
It's a square box with a single long plug that has one bolt in the middle of the plug holding it on.
Was this
answer
helpful?
Yes
No
Sunday, June 5th, 2011 AT 1:26 AM
Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
Found it, black box about 3"x1"x1", located near firewall and next to dryer. Do you know what wire no. Would be the ground.
Was this
answer
helpful?
Yes
No
Sunday, June 5th, 2011 AT 1:58 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
The dimensions should be 3X3X1". I already told you what to test.
Was this
answer
helpful?
Yes
No
Sunday, June 5th, 2011 AT 2:09 AM
Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
It was'nt the box near the firewall, but a black box located in the fender well. I made sure there was a good ground, but it still did'nt work. Is there a way to check the CCRM?
Was this
answer
helpful?
Yes
No
Monday, June 6th, 2011 AT 4:29 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
That's not what I asked you to do. I gave you a specific wire that is the trigger wire for the A/C relay. The PCM supplies ground on that wire to the CCRM. I need to know if the PCM is supplying that ground or not.
Was this
answer
helpful?
Yes
No
Monday, June 6th, 2011 AT 9:52 PM
Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
Followed your instructions, made sure CCRM was grounded, checked pink/yellow wire with engine running and ac off the wire read 13.8v, when ac was on it read.2v.
Was this
answer
helpful?
Yes
No
Tuesday, June 7th, 2011 AT 12:43 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
That's a backwards way of looking for a ground signal but it looks like it did answer the question. It looks like the CCRM is just not responding.
Was this
answer
helpful?
Yes
No
Tuesday, June 7th, 2011 AT 12:47 AM
Tiny
AIRNUT
  • MEMBER
  • 9 POSTS
Thanks for your patience, I'll replace the CCRM, and let you know.
Was this
answer
helpful?
Yes
No
Tuesday, June 7th, 2011 AT 1:42 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Closing question
Was this
answer
helpful?
Yes
No
Thursday, June 30th, 2011 AT 11:35 PM

Please login or register to post a reply.

Sponsored links