4x4/tccm malfunction after battery disconnect
Thread Starter
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New Member
Joined: Jan 2023
Posts: 4
4x4/tccm malfunction after battery disconnect
Hello all,
I recently took my 2000 blazer 4WD for a serpentine belt replacement. The battery was disconnected and after being reconnected the kick panel box ticks and the 4w panel lights up on and off. Initially the car had acceleration issues that were later resolved (for now) after promptly driving it back to the shop. The battery was disconnected and the terminals were cleaned. The issue with the 4w has persisted. Now I’m looking at a $200 diagnostic fee and the cost of possibly replacing the tccm. Never had this issue before and only appeared after the battery removal. Any help to resolve would be greatly appreciated!
thank you,
dave
I recently took my 2000 blazer 4WD for a serpentine belt replacement. The battery was disconnected and after being reconnected the kick panel box ticks and the 4w panel lights up on and off. Initially the car had acceleration issues that were later resolved (for now) after promptly driving it back to the shop. The battery was disconnected and the terminals were cleaned. The issue with the 4w has persisted. Now I’m looking at a $200 diagnostic fee and the cost of possibly replacing the tccm. Never had this issue before and only appeared after the battery removal. Any help to resolve would be greatly appreciated!
thank you,
dave
BF Guru
Joined: Dec 2016
Posts: 5,618
From: Moscow, ID
Because it is easy to check, I'd take the kick panel off and visually inspect the TCCM and its electrical connections in the plug and socket. Some have reported that the terminals can get corroded.
The failure of the TCCM being due to the battery disconnect could be true or just a coincidence.
The clicking TCCM is something many of us have had to face.
if you are near a wrecking yard, you might try getting a used one. If you have a U-Pull yard, then since it is so easy to remove one on your own, you can save even more money. I think the U-Pull yard I've used might charge $30 for general electrical parts. You can always call ahead and ask the price too. My advice if you get one from any wrecking yard would be to make sure you get a TCCM with a compatible part number and transfer case. The transfer case will either be a "3-button" or "4-button" type. The 4-button has a fourth "Auto 4wd" button.
You can check the part numbers for different years by looking at a GM parts website. I like using this one: https://www.gmpartsgiant.com/. There you can put in your Blazer info or the VIN to find compatible parts. You then can look at other year Blazers to see if they use the same part numbered TCCM. You might have to have your list of RPO codes from the sticker on the inner panel of the glove box door to check the RPO code for the transfer case you have.
Good Luck.
The failure of the TCCM being due to the battery disconnect could be true or just a coincidence.
The clicking TCCM is something many of us have had to face.
if you are near a wrecking yard, you might try getting a used one. If you have a U-Pull yard, then since it is so easy to remove one on your own, you can save even more money. I think the U-Pull yard I've used might charge $30 for general electrical parts. You can always call ahead and ask the price too. My advice if you get one from any wrecking yard would be to make sure you get a TCCM with a compatible part number and transfer case. The transfer case will either be a "3-button" or "4-button" type. The 4-button has a fourth "Auto 4wd" button.
You can check the part numbers for different years by looking at a GM parts website. I like using this one: https://www.gmpartsgiant.com/. There you can put in your Blazer info or the VIN to find compatible parts. You then can look at other year Blazers to see if they use the same part numbered TCCM. You might have to have your list of RPO codes from the sticker on the inner panel of the glove box door to check the RPO code for the transfer case you have.
Good Luck.
Moderator
Joined: Oct 2014
Posts: 4,343
From: North Central Indiana
Hello all,
I recently took my 2000 blazer 4WD for a serpentine belt replacement. The battery was disconnected and after being reconnected the kick panel box ticks and the 4w panel lights up on and off. Initially the car had acceleration issues that were later resolved (for now) after promptly driving it back to the shop. The battery was disconnected and the terminals were cleaned. The issue with the 4w has persisted. Now I’m looking at a $200 diagnostic fee and the cost of possibly replacing the tccm. Never had this issue before and only appeared after the battery removal. Any help to resolve would be greatly appreciated!
thank you,
dave
I recently took my 2000 blazer 4WD for a serpentine belt replacement. The battery was disconnected and after being reconnected the kick panel box ticks and the 4w panel lights up on and off. Initially the car had acceleration issues that were later resolved (for now) after promptly driving it back to the shop. The battery was disconnected and the terminals were cleaned. The issue with the 4w has persisted. Now I’m looking at a $200 diagnostic fee and the cost of possibly replacing the tccm. Never had this issue before and only appeared after the battery removal. Any help to resolve would be greatly appreciated!
thank you,
dave
Thread Starter
|
New Member
Joined: Jan 2023
Posts: 4
Because it is easy to check, I'd take the kick panel off and visually inspect the TCCM and its electrical connections in the plug and socket. Some have reported that the terminals can get corroded.
The failure of the TCCM being due to the battery disconnect could be true or just a coincidence.
The clicking TCCM is something many of us have had to face.
if you are near a wrecking yard, you might try getting a used one. If you have a U-Pull yard, then since it is so easy to remove one on your own, you can save even more money. I think the U-Pull yard I've used might charge $30 for general electrical parts. You can always call ahead and ask the price too. My advice if you get one from any wrecking yard would be to make sure you get a TCCM with a compatible part number and transfer case. The transfer case will either be a "3-button" or "4-button" type. The 4-button has a fourth "Auto 4wd" button.
You can check the part numbers for different years by looking at a GM parts website. I like using this one: https://www.gmpartsgiant.com/. There you can put in your Blazer info or the VIN to find compatible parts. You then can look at other year Blazers to see if they use the same part numbered TCCM. You might have to have your list of RPO codes from the sticker on the inner panel of the glove box door to check the RPO code for the transfer case you have.
Good Luck.
The failure of the TCCM being due to the battery disconnect could be true or just a coincidence.
The clicking TCCM is something many of us have had to face.
if you are near a wrecking yard, you might try getting a used one. If you have a U-Pull yard, then since it is so easy to remove one on your own, you can save even more money. I think the U-Pull yard I've used might charge $30 for general electrical parts. You can always call ahead and ask the price too. My advice if you get one from any wrecking yard would be to make sure you get a TCCM with a compatible part number and transfer case. The transfer case will either be a "3-button" or "4-button" type. The 4-button has a fourth "Auto 4wd" button.
You can check the part numbers for different years by looking at a GM parts website. I like using this one: https://www.gmpartsgiant.com/. There you can put in your Blazer info or the VIN to find compatible parts. You then can look at other year Blazers to see if they use the same part numbered TCCM. You might have to have your list of RPO codes from the sticker on the inner panel of the glove box door to check the RPO code for the transfer case you have.
Good Luck.
Thread Starter
|
New Member
Joined: Jan 2023
Posts: 4
Because it is easy to check, I'd take the kick panel off and visually inspect the TCCM and its electrical connections in the plug and socket. Some have reported that the terminals can get corroded.
The failure of the TCCM being due to the battery disconnect could be true or just a coincidence.
The clicking TCCM is something many of us have had to face.
if you are near a wrecking yard, you might try getting a used one. If you have a U-Pull yard, then since it is so easy to remove one on your own, you can save even more money. I think the U-Pull yard I've used might charge $30 for general electrical parts. You can always call ahead and ask the price too. My advice if you get one from any wrecking yard would be to make sure you get a TCCM with a compatible part number and transfer case. The transfer case will either be a "3-button" or "4-button" type. The 4-button has a fourth "Auto 4wd" button.
You can check the part numbers for different years by looking at a GM parts website. I like using this one: https://www.gmpartsgiant.com/. There you can put in your Blazer info or the VIN to find compatible parts. You then can look at other year Blazers to see if they use the same part numbered TCCM. You might have to have your list of RPO codes from the sticker on the inner panel of the glove box door to check the RPO code for the transfer case you have.
Good Luck.
The failure of the TCCM being due to the battery disconnect could be true or just a coincidence.
The clicking TCCM is something many of us have had to face.
if you are near a wrecking yard, you might try getting a used one. If you have a U-Pull yard, then since it is so easy to remove one on your own, you can save even more money. I think the U-Pull yard I've used might charge $30 for general electrical parts. You can always call ahead and ask the price too. My advice if you get one from any wrecking yard would be to make sure you get a TCCM with a compatible part number and transfer case. The transfer case will either be a "3-button" or "4-button" type. The 4-button has a fourth "Auto 4wd" button.
You can check the part numbers for different years by looking at a GM parts website. I like using this one: https://www.gmpartsgiant.com/. There you can put in your Blazer info or the VIN to find compatible parts. You then can look at other year Blazers to see if they use the same part numbered TCCM. You might have to have your list of RPO codes from the sticker on the inner panel of the glove box door to check the RPO code for the transfer case you have.
Good Luck.
BF Guru
Joined: Dec 2016
Posts: 5,618
From: Moscow, ID
Thanks for the update.
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