4x4 stopped working

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05-10-2019, 07:46 PM

#11

PaulCrowther

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Quote:

Originally Posted by isvend

Without the engine running but the key in the ON position, do you hear the click when switching from 2 to 4x4 H?

No click. Think it’s one of the relays? Seems there’s two. Any way of knowing which to try replacing. I doubt I’m qualified to test them...

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05-10-2019, 11:51 PM

#12

Rustymusician

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What if only 4H light comes on?

Quote:

Originally Posted by PaulCrowther

No click. Think it’s one of the relays? Seems there’s two. Any way of knowing which to try replacing. I doubt I’m qualified to test them...

What if only 4H light comes on and no 4L but hear the click?

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05-11-2019, 06:30 AM

#13

PaulCrowther

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Originally Posted by PaulCrowther

Needed 4x4 today and it didn’t come on (triton 5.4 automatic). 4-5 months ago had a front hub and vacuum lines replaced. Can’t remember if I’d used 4x4 since but likely confirmed it worked after that repair. Possible causes?

No 4H light, no 4L light, no click, no front wheel engagement.

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05-11-2019, 06:32 AM

#14

PaulCrowther

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Quote:

Originally Posted by Rustymusician

What if only 4H light comes on and no 4L but hear the click?

No 4H light, no 4L light, no click, no front wheel engagement

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05-11-2019, 08:19 AM

#15

Roadblock007

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If it were me I would split the problem in half. Figure out if it's in the truck or under the hood. Unplug the harness from the IWE solenoid and hook up a volt meter to the harness. See it you get voltage when you turn the switch. At least then you'll know where to go next.

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05-11-2019, 08:57 AM

#16

techrep

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Quote:

Originally Posted by isvend

Without the engine running but the key in the ON position, do you hear the click when switching from 2 to 4x4 H?

I asked him that 6 post ago...lol

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05-11-2019, 08:59 AM

#17

techrep

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Quote:

Originally Posted by PaulCrowther

No 4H light, no 4L light, no click, no front wheel engagement

do the 4H and 4Io lights come on when you start your truck ? as in with all the other cluster lights.

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05-11-2019, 11:18 AM

#18

PaulCrowther

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Quote:

Originally Posted by techrep

do the 4H and 4Io lights come on when you start your truck ? as in with all the other cluster lights.

Yes the lights work on startup. I swapped out the 30A fuse w/o change. I also swapped with each other the two 30A RELAYS w/o change. Advance didn’t have in stock so I couldn’t try a new relay. Do those two relays have different functions and if either one dies you get no action?

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