Question about 1999 GMC Safari

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99 GMC Safari AC fuse has constant 12v even with key off.

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  • 1,250 Answers

Power goes from htr a/c fuse to selector switch
and power to blower relay part of resistor module
when you plug resistor key off then no blower because htr fuse current coming from ignition switch
hope it helps

Posted on Oct 11, 2013


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Posted on Jan 02, 2017

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SOURCE: Push ac button , compressor doesn't turn on (fuse?)

when's the last time you pushed the button? with engine off see if you can turn the front of the compressor. if it moves then backprobe with a test light.

Posted on Mar 24, 2009

  • 68 Answers

SOURCE: 1990 gmc safari just wont starteven though the


Posted on Aug 20, 2009

  • 60 Answers

SOURCE: the fan is not working on my gmc 1995 safari, but

needs sensor on radiator for te system

Posted on Jun 27, 2010

  • 4340 Answers

SOURCE: 1995 gmc safari van.

WEll, something is amock, use a curcuit breaker, self resetting, and chase it down. Consider an amp draw reading on the clutch.....

Posted on Sep 08, 2010

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1 Answer

How do you know a blown fuse for 2003 safari gmc

using a test light check the fuses with the key on as some fuses are only powered when the key is on. check both sides of the fuse.

Aug 11, 2014 | 2003 GMC Safari

1 Answer

Where to tap 12v switched in the dash?

There should be the power wire to the stereo that you can tap into. Red not yellow. Yellow is constant power and red is power when the key is on.

May 21, 2014 | GMC Sierra 2500HD Cars & Trucks

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My 99 safari volt meter always stays on about 14 even at idle but recently it has started dropping to about 12 at idle then back to 14 when driving. what is this indicating?

Not necessarily a problem. It depends on MANY things. If you are running lights, heater or AC, brake lights, all of these things can cause what you describe.

At speed (2,000 rpm or so), you need to be 14 volts or higher.

To test:

Fully charge, then load test battery.
If Battery okay, then load test the alternator to check output amps. If no tester is available, often parts stores will test for free.

Jul 28, 2010 | 1999 GMC Safari

1 Answer

I'm installing a gps tracking unit on one of our landscape trucks. It's a 97 gmc/chevy 2500. I need to connect it to the ignition(12v dc) and constant power (12v dc)

Whenever I add accessories to our trucks at work,I always go directly to the battery with an in line fuse somewhere in the circuit. This keeps from draining power from any thing else on the vehicle.Since this will be a low power drain,you may want to look at your fuse panel and see if there is an empty fuse holder marked accessories and use that.Some vehicles have 2 one that is on with the key and one that is always hot. Good luck!

Mar 21, 2010 | 1997 GMC Sierra K2500

2 Answers

I have 1999 gmc safari. it won't start, there is no power from the ignition to the starter. Van will start if kicked over by screw driver. any ideas?

screwdriver works, which means the battery is good and the starter works. in between is the ignition switch. first you should check for 12V at the starter post w/ the smaller wire on it as the key is held in "start" position. if no, then you should probe the supply wire @ the ignition switch (Red wire) for constant 12V; if no, then there is a bad wire/fuse between the battery and the ignition switch. if it does then probe the ignition wire on the switch (Pink) w/ key in "on" position. if no voltage, then bad ignition switch. if yes, then probe the starter wire on the switch (Yellow) for 12V w/ key in "start" position. If no, then bad ignition switch. If yes, then check for wire break between ignition switch and starter

Sep 30, 2009 | 1999 GMC Safari

1 Answer

@001 GMC Safari, No fan for A/C or heater, lights

Fusible link is in the main battery 12v wire somewhere between the battery and the fuse block. However, if that blew, the truck will be dead. I really depends where the lift wire was connected, and as you pointed out, that is bad as it may have burned out the wire it's connected to - focus on that connection and the other systems on it.

Jul 01, 2017 | 2001 GMC Safari

1 Answer

AC does not turn on

if the fan does not work , first check fuse then possibly the switch could go bad they can overheat with time and might even need a new connector to the switch. Are you sure it has freon,pres sw. will prevent comp cl. from starting. turn key on with AC on fan too and try a screwdriver on the clutch to feel for a magnetic pull, if the gap is too big it won;t pull in..any more needed?

Jul 27, 2008 | 1997 GMC Safari

2 Answers

Rear A/C not working on my 2000 GMC Safari

I think that there is 2 solutions:

1. Check if there is enough gas.

2. Maybe you have to change the gas, maybe you put gas that don't fix to your car.

Jun 17, 2008 | 2000 GMC Safari

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