No 4x4

[Ice-Mike]

Ok 4x4 dont work on explorer 99 allwheel drive. 4x4 hi and lo blinks

computer says p1824 and p1812



what is a common solution??? should a take the gem out to inspect??? all fuses are ok... and all other things in car work.

 

[gijoecam]

First, a little more information is needed: Does 4auto work at all, or do the lights blink from the moment you turn the key on?

P1812 is the code for 4WD mode select Circuit Failure
P1824 is the code for 4wd Electric Clutch Circuit Failure

I wouldn't suspect the GEM as it's the GEM that's detecting the problem. I assume that since you were able to obtain the GEM diagnostic trouble code, you can also monitor the GEM PIDs using the same piece of equipment, no? If so, I can walk you through the diagnostic routines for the two codes.... But lets start with the obvious things first.

Fuses:

Interior fuse panel:
#28 (7.5A mini)
#10 (7.5A mini)
#20 (7.5A mini)

Battery Junction box:
#4 (30A MAXI)

There are others, but I would not suspect them because they would have other issues associated with them...

Both diagnostics point towards either a switch failure, a TOD relay issue, or a clutch failure, or some combination of the three. The easiest place to start would be with popping the bezel off and seeing if the wires became disconnected from the switch. I would also check the resistance through the switch between the two middle terminals.

AUTO: 3700-4100 ohms
4HIGH: 1050-1150 Ohms
4LOW: 340-380 Ohms

If that looks good, there are a few more things we can check from there.... But start there and let me know what you find.

 

[Ice-Mike]

4X4 lights start to blink after maby 2-3 min from start of driving. and then comes and goes, i found out to day that crouse control dont work at all, and rear window washer dont work.... maby its related maby not???

i talked to pre owner and he states that it started "slow" sometimes it went on and sometimes not. then it just went dead. no 4x4.

i did check the fuses in the hood and in the cab.. they are ok... i will change them to be sure. will look at the switch


it would be great if GEM is ok it cost 800$ at stealer

thanks for the help a let you now how it goes.

 

[Ice-Mike]

Well that went well...... somehow the plug on the 4x4 switch had falled off... plugged it in and it works great

almost to easy to be true for my taste.....


thanks for the help!!!