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2002 toyota sequoia ac light blinking

AC not blowing cold. Had check done at Pep Boys, AC charged, no leaks in system. Test said no power to compressor. Read up online and wondering should the magmetic clutch relay and a/c compressor control relay both be changed? If not how do you test relays and fuses to see if this is the power problem?

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  • Toyota Master
  • 21,873 Answers

You would need the shop manual to get the wiring diagrams to trace the circuit. I'm surprised Pep Boys did not go ahead and do the work.
You have to back-track from the compressor clutch to find out where the power is stopping and why.

Posted on Jul 12, 2013

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Posted on Jan 02, 2017

chiquititas
  • 1010 Answers

SOURCE: air conditioning

here is a link to your problem and a solution:
http://en.allexperts.com/q/4-Wheel-Drive-2700/2008/5/C-Clutch-engaging.htm

Posted on Jun 19, 2008

alicantecoli
  • 22095 Answers

SOURCE: AC compressor clutch not engaging. Fuses ok

sounds like lack of gas pressure,take it to specialist and and get it recharged to the correct weight of gas,it is positivly dangerous to play with this because the A/C uses high pressures and can cause frostbite in 2 seconds when trying to refill with these boy racer silly aftermarket top up cans.THESE SHOULD BE BANNED WORLDWIDE

Posted on Jun 28, 2009

  • 1 Answer

SOURCE: 1991 Sierra GMC AC control problem

The follwing is a cut and paste from a service bulletin:

Bulletin No.: 461202

Date: May, 1994

SUBJECT:
A/C CONTROL HEAD FLASHES OR ERRATIC OPERATION OF A/C CONTROLS (POLISH
TERMINALS)

MODELS:
1988-94 CHEVROLET AND GMC TRUCK C/K MODELS
1990-94 CHEVROLET AND GMC TRUCK TOPKICK/KODIAK MODELS WITH C60 OR C69 AIR
CONDITIONING

CONDITION:

A/C Control Head flashes, performs erratically or malfunctions.

CAUSE:

Light surface corrosion on the Control Head terminals.

CORRECTION:

Remove the A/C Control Head and while holding the unit with the terminal
cavity down (toward the floor) so no particles will fall inside on the
circuit boards, polish the terminals on both sides of the cavity with a lead
pencil pink eraser. Do not use an ink eraser or other abrasive such as a
small wire brush or sandpaper, etc. Doing so will remove the terminal
coating and degrade the contact surface.

Performing this procedure, in many cases, will make replacing the Control
Head unnecessary. Using this procedure in conjunction with the A/C circuit
diagnosis found in the Electrical Diagnosis Manual and especially before
replacing a Control Head for any reason is recommended.

After polishing the Control Head terminals, but before reconnecting, check
for proper terminal contact as described in the applicable electrical
diagnosis manual. If contact is good, apply dielectric grease (P/N 12345579)
to the harness connector terminals. Please do not apply grease to the
Control Head.

Posted on Jun 30, 2009

philschneide
  • 448 Answers

SOURCE: ac compressor clutch relay 1991 honda accord

Difficult to describe, but I will give it a try.
Inside the driver's side fender, close to the front of the car, there is a bracket that is held in place by one bolt, but which has a short horizontal bar as part of it which has two large clips encircling two cylinderical devices which have wires clipped into them at the bottoms. The one closest to the front (radiator) is the compressor clutch relay. The other one is the condenser fan relay.
Hope this helps you find it.

Posted on Oct 20, 2009

  • 507 Answers

SOURCE: can some post the 1999 gmc sierra wiring diagram

you don't have enough pressure in your system. odds are you have a leak someplace and the factory installed a saftey switch to keep the ac from running when there is no pressure. This way you don't end up burning up your compressor.

Posted on Jan 13, 2010

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