Service 4wd light

[Jmccord]

Driving down the road "service 4wd light " flashes on than off . Does not stay on longer than 3 seconds. Sometimes less than a second. No lift. Stock height. 33in tires. No hard-core wheelin. Any ideas?? No check engine light either

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[Bill_BCNtoNY]

if you’re lucky it can be a dirty ABS sensor. Super easy to access, clean and remount!

give it a shot and let us know

 

[Jmccord]

if you’re lucky it can be a dirty ABS sensor. Super easy to access, clean and remount!

give it a shot and let us know

I'll check that out thanks. I've checked all the fuses already also

 

[Bill_BCNtoNY]

I'll check that out thanks. I've checked all the fuses already also

while you’re there, make sure whoever touched them last installed them properly in the rear - one of mine was run incorrectly in a way that put a tension on the wire

 

[At Risk Ute]

Try pushing down on all your fuses. Light is coming in 2H?

 

[Jmccord]

Try pushing down on all your fuses. Light is coming in 2H?

Yes 2h. Normal street driving

 

[At Risk Ute]

Yes 2h. Normal street driving

Does your transfer case have 4H auto? Maybe leave it in that and see if it stays long enough to visit the dealer.

 

[Jmccord]

Does your transfer case have 4H auto? Maybe leave it in that and see if it stays long enough to visit the dealer.

Nope. 2h/4h/ 4lo. 2018 JLU Sport

 

[mwilk012]

Nope. 2h/4h/ 4lo. 2018 JLU Sport

You're not going to make any headway whatsoever without pulling DTC's from the DTCM/TCCM.
A wheel speed sensor will cause ABS/Stability Control/4wd/CEL to come on, your problem is something in the 4wd system like a FAD actuator circuit fault, or transfer case position sensor fault.

 

[bcupton]

Mine had to have the wire replaced and that fixed it.

 

[Jmccord]

Mine had to have the wire replaced and that fixed it.

Which wire did you replace?

 

[Anth6ny]

There are hundreds of variables. Your best bet is to buy a Bluetooth OBD scanner on Amazon and download jscan. You can run the codes and see exactly what’s happening. It could be a wheel speed sensor (ABS sensor), a transfer case sensor, a FAD issue, or a transmission issue. It could even be mismatched tire sizes. Just run the codes and it will make diagnosis much easier.

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