Tip & How-To about 1998 Plymouth Grand Voyager

Checking Relays (and fuses)

This tip is useful for all types of vehicles:

If you think that you may have a bad (burned out) relay: before you go buy a new one: purchase (if you don't have one) a fuse tester.

1. Disconnect the battery.
2. Pull suspected "bad' relay
3. With fuse tester adjusted accordingly:
a. make sure relay is not melted, or coming apart
b. With the two prongs on the tester, touch two prongs on the relay until the light on the tester comes on. There is no way of knowing with two are the live ones except by touching two together.
c. If the light comes on, you're good to go; and if not...well, you know...replace the relay.

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Great tip! Thanks. I inspected my relay and the contacts definitely showed signs of arching. Another cause of a flashing AC button light is a loose connection (male to female plug) at the compressor. I had my timing belt replaced and the Toyota mechanic failed to plug it back in... the light would be on for about 5 seconds then start to flash for this as well.

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I can say I have had the same problem, only the back doors and the rear hatch/glass won't open using keyless remote from them freezing this Winter.  The front two driver/passenger doors will unlock with keyless remote but none of the rear doors, hatch or glass.  Since I had to replace the stoplight bulbs in the rear with one not working and I don't need a ticket on Memorial Day weekend (need to replace 2 at the same time is wise according to any good mechanic), I had to get the rear hatch open to get to the lamp assembly and replace the bulbs.  My thinking was that since my two front locks were opening but no others and my keyless remotes are working, it has to be a fuse or relay that is not working!  So, I talked with a NAPA rep and he said the "Day running lights" relay can be a temporary fix to get the rear locks open to replace the bulbs.  I looked up in the owners manual where both relay's are located and removed the "Locked" relay and "Day running lights" relay and put the "Day running lights" into the same slot where the "Locked" relay was not operating and it worked!  I got the doors unlocked and replaced my stoplight bubs replaced.  Now, I have a new problem, my Tahoe won't start!!  I'm assuming the relay wasn't supposed to stay in the wrong slot when operating the vehicle because I started the truck, and it started and died-started and died-same and again.  I think the wrong fuse can be used to fix another problem like a fuse.  But, a fuse you can leave in and deal with one operation in the vehicle not working until you can replace the fuse later when you purchase it.  But, not a relay!  Now, I think the confused electronics cause another component (possibly the fuel pump relay) to burn out with the wrong relay in place of another when the vehicle operates.  I should have known but I was so glad to get the doors open after two months and it being Memorial Day weekend.  Now I have to find out what else is wrong so don't make that mistake to avoid the same predicament.  Better to get the relay ordered and replaced than to have this happen to you. 

Apr 09, 2009 | 2005 Chevrolet Tahoe

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