Troubleshooting exercise #1

LabRat

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This should be fun. Will also help folks out in learning Liberty electronics.
Gurus please withhold answers to let the less experienced have a chance!

Can you troubleshoot this problem from this photo? Jeep is on and at idle. I’m not wearing a seatbelt.

(I already know and have replacement parts- no worries!)
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lfhoward

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Wheel speed sensor. If rusted to oblivion, a new wheel bearing assembly is the fix.

Or, it is frayed and grounded out wiring on the way to a wheel speed sensor.

Don’t think I am a guru at Jeep electronics — but I saw an Eric O. South Main Auto video at one point where the magnetic ring in the wheel bearing had rusted out, and it caused symptoms like this.
 
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LabRat

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Just bumping this up again as from what I have read this is a fairly common problem in vehicles equipped with the circuit.
I'll add a hint:
This happened when I replaced worn out lower ball joints that had been installed so one couldn't get to the zerk fittings...
 

Steve777

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Assuming those lites stay on (and it's not just you caught them as they first flash at startup), I'd agree it is likely a wheel speed sensor or wiring. The '06s were somewhat know for breaks in the speed sensor wiring to the rear wheels, so I'd check for that first. Of course it could also be a bad sensor, connector or tone ring.

If you go someplace with a good code reader (autozone), you should be able to pull the ABS codes which will tell you which wheel(s) are having problems. Helps to narrow your search.
 

LabRat

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Assuming those lites stay on (and it's not just you caught them as they first flash at startup), I'd agree it is likely a wheel speed sensor or wiring. The '06s were somewhat know for breaks in the speed sensor wiring to the rear wheels, so I'd check for that first. Of course it could also be a bad sensor, connector or tone ring.

If you go someplace with a good code reader (autozone), you should be able to pull the ABS codes which will tell you which wheel(s) are having problems. Helps to narrow your search.
You are correct.

No codes needed. I managed to break both sensors off when installing greasable moog lower ball joints. (And a lift)

I already have replacements, however I’m waiting on a few other parts and a break in the weather before I install them. This Jeep is parked as a result.
 

LabRat

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Soooo… had time today to replace both sensors. Rest the system and fanged if the lights came back on.
Pulled both sensors back out to make sure wasn’t rust or something on the Hall effect sensors and codes reset. Went to fill the tank before the storm and bam, they came back on.

I’m stumped.
Ideas?
 

tommudd

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Soooo… had time today to replace both sensors. Rest the system and fanged if the lights came back on.
Pulled both sensors back out to make sure wasn’t rust or something on the Hall effect sensors and codes reset. Went to fill the tank before the storm and bam, they came back on.

I’m stumped.
Ideas?
Did you try unhooking both battery cables, tying them together for 1/2 hour or so. Then reinstall them and take it out for a hard run.
 
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