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A/c problems help!

1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

A/c problems help!

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Old

Jul 19, 2015 | 12:03 PM

#1

Geary

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A/c problems help!

So I've had leaks fixed, low press sensor replaced, fuses check out, clutch coil replaced and still have gotten nowhere. I have 12v of power at the clutch connector unplugged, but when I pick the wire while it's plugged up and turn the system on, the 12v disapeares. I've jumped the clutch directly to battery and it does operate and blows plenty of cold air. Why do I lose voltage when the connector is connected??? Thanks in advance

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Old

Jul 19, 2015 | 12:09 PM

#2

JWC 3

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From: Tennessee

What year is your truck ?

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Old

Jul 19, 2015 | 12:11 PM

#3

Geary

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95 f150 5.0 107,xxx mi

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Old

Jul 19, 2015 | 12:29 PM

#4

JWC 3

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From: Tennessee

You are dropping voltage ... Sounds like a wiring or connector issue .
Check for corroded connections and check for damaged wiring .

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Old

Jul 19, 2015 | 02:37 PM

#5

Geary

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it would be super helpful to have a wiring schematic. where do i get such thing?

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Old

Jul 20, 2015 | 09:08 AM

#6

rla2005

Fleet Owner

Joined: Oct 2005

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From: Kentucky

Quote:

Originally Posted by Geary

it would be super helpful to have a wiring schematic. where do i get such thing?

Here:

The disappearing 12V is caused by an open circuit, it's a phantom voltage that your high impedance meter is displaying.

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Old

Jul 30, 2015 | 08:37 AM

#7

WoodBoss

Senior User

Joined: Mar 2015

Posts: 126

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From: Sherrills Ford, NC

Check to see if you have voltage before and after the ac cycling pressure switch, if you don't work your way back.

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