Another 4x4 question.
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Joined: Jul 2015
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TCCM should know by 4WD fuse 15 to not try to move the transfer case with the ignition shut off. If the TCCM is clicking with key shut off, and no lights in 4WD switch (which are fed by the TCCM), then I bet the TCCM is bad. In that case, disconnecting the TCCM connectors would make the draw on the battery go away. Question would then be if there was something wrong that damaged the TCCM? Don't believe the ABS is on the circuit after ATC fuse, so not sure how it could be involved. Note that disconnecting TCCM connectors does not disconnect the feed to the encoder motor lock so it could also be a source of the draw.
Let me work on isolating the TCCM, then see if there's still a draw. If there is, I will check if the ABS coincides with that system.
Lesmyer, you are awesome. Thanks.
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Joined: Oct 2014
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From: North Central Indiana
Hope you're on the right track now. Let us know.
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Wild Goose Chase
OK.
This sonofagun is going to be an epic journey.
As it turns out, the wheel speed sensors at the front hubs also tell the TCCM when to engage the Auto 4wd.
With my ABS light on, this maybe the culprit. Could be a bad hub, bad sensor, a bad connection, or wiring. Even the gasket at the sensor could knock the wheel speed sensor out enough to send an ABS code, and not allow the 4wd to kick in.
So, I'll start at the wheel speed sensors, and work back. If I can remedy the ABS, that will eliminate future headaches and tail chasing when diagnosing the 4wd components.
Wish me luck.
This sonofagun is going to be an epic journey.
As it turns out, the wheel speed sensors at the front hubs also tell the TCCM when to engage the Auto 4wd.
With my ABS light on, this maybe the culprit. Could be a bad hub, bad sensor, a bad connection, or wiring. Even the gasket at the sensor could knock the wheel speed sensor out enough to send an ABS code, and not allow the 4wd to kick in.
So, I'll start at the wheel speed sensors, and work back. If I can remedy the ABS, that will eliminate future headaches and tail chasing when diagnosing the 4wd components.
Wish me luck.
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I forgot to mention, at this point, I should read the ABS trouble codes to get me to a starting point. There are several sensor locations, so this may tell me where to be.
My local garage will charge me in the neighborhood of $50 to extract the codes, and I could be back several times. So in lieu of doing this, I have ordered an inexpensive OBD2/ABS Diagnostic Code Scan Tool. It was only $50, so I'll give it a swing.
My local garage will charge me in the neighborhood of $50 to extract the codes, and I could be back several times. So in lieu of doing this, I have ordered an inexpensive OBD2/ABS Diagnostic Code Scan Tool. It was only $50, so I'll give it a swing.
Last edited by txschutte; Aug 1, 2015 at 02:46 PM.
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Joined: Oct 2014
Posts: 4,336
From: North Central Indiana
I forgot to mention, at this point, I should read the ABS trouble codes to get me to a starting point. There are several sensor locations, so this may tell me where to be.
My local garage will charge me in the neighborhood of $50 to extract the codes, and I could be back several times. So in lieu of doing this, I have ordered an inexpensive OBD2/ABS Diagnostic Code Scan Tool. It was only $50, so I'll give it a swing.
My local garage will charge me in the neighborhood of $50 to extract the codes, and I could be back several times. So in lieu of doing this, I have ordered an inexpensive OBD2/ABS Diagnostic Code Scan Tool. It was only $50, so I'll give it a swing.
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Joined: Oct 2008
Posts: 1,786
From: Tucson, Arizona
Hopefully you have seen the ABS threads on here and that the common "fix" is to resolder the connector, relay and solenoid pins in order to get the ABS light off.
Pretty easy thing to do with the most difficult part being cutting through the seal under the plastic cover so that it can be removed to access the circuit board. Then need a T-8 torx bit to get the small screws out holding the circuit board.
Good thing you enjoy a project...is your daughter helping you?
Pretty easy thing to do with the most difficult part being cutting through the seal under the plastic cover so that it can be removed to access the circuit board. Then need a T-8 torx bit to get the small screws out holding the circuit board.
Good thing you enjoy a project...is your daughter helping you?
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