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Electrical 2nd Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 12-14-2009, 11:51 AM
BrianM BrianM is offline
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Unhappy ABS Module replacement

Hi everyone , I`m new here. My father has a 97 1500 5.2l with 4wd. The abs and brake lights are on and come back on (in a short time) after being reset . The dealer says the abs module needs to be replaced and wants $2400 for the repair. What is involved with replacing the module in this truck?


Thanks in advance,
Brian
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Old 12-14-2009, 12:19 PM
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Did the dealer actually do the diagnosis and which part of the ABS are you referring to, the CAB or the HCU?

Last edited by RamTech; 12-14-2009 at 12:27 PM.
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Old 12-14-2009, 01:05 PM
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The dealer did the diagnosis. They just said the abs control module needed replacement. The first time it went in they said it was an electrical problem in one of the harness connectors ( resistance issue). They reset the computer codes and it worked for about a week when the brakes started to fail coming down a hill that had an intersection at the bottom. Strange feeling when a brake line separates and you only have a bit of brake at the end of the pedal stroke. It went back to the dealer and they put in new brake lines ( $800 - had to drop the gas tank to get to them). This when they said it was the abs control module that needed replacing. My fathers regular mechanic, not the dealership, replaced the abs sensor before he gave up and the truck was taken to the dealership. Sorry I can`t really help with the correct terms as I do not know Dodge pickups mechanically. If it was an 88 Jeep cherokee then I could ( a simpler but very quirky vehicle).

Thanks,
Brian
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Old 12-14-2009, 01:14 PM
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I assume they mean the CAB (controller, anti-lock Brake) needs replacing and not the HCU (hydraulic control unit).
CONTROLLER ANTILOCK BRAKE

REMOVAL
  1. Remove and isolate negative battery cable.
  2. Release CAB connector locking handle and remove connector CAB Harness Connector
  3. Remove the 2 CAB mounting bolts and remove CAB from bracket.
INSTALLATION
  1. Install CAB in mounting bracket.
  2. Install mounting bolts.
  3. Connect harness and lock into place with locking handle.
  4. Install negative battery cable.
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Old 12-14-2009, 01:16 PM
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I don't know what kind of labor they're charging, but it does seem kind of pricey. I have replaced rear brake lines on those trucks without dropping the fuel tank, but dropping the tank is really the best way to go.
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Old 12-14-2009, 01:37 PM
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Thanks Remerson. If it is the HCU, I take it the brake fluid needs to be replaced and lines bleed. Anything else need to be done if it is the HCU?
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Old 12-14-2009, 02:07 PM
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HYDRAULIC CONTROL UNIT/CONTROLLER ANITLOCK BRAKE

REMOVAL
  1. Disconnect ABS harness at HCU ABS Harness
  2. Unlatch and disconnect harness at controller.
  3. Disconnect lines to front brakes at HCU HCU Brake Lines
  4. Remove stud nuts and bolt that attach HCU to inner fender panel HCU Mounting Then remove valve from engine compartment.
  5. If valve is only being removed for access to another component, cover brake line fluid ports with tape or plugs to prevent dirt entry.
  6. Remove bolts attaching CAB to HCU and remove controller.
INSTALLATION
  1. Install module on HCU.
  2. Position HCU on mounting studs.
  3. Install and tighten mounting bolt and stud nuts. Tighten bolts and nuts to 10-13 Nm (92-112 in. lbs.)
  4. Connect ABS harnesses to HCU and CAB. Be sure CAB harness is securely latched in place.
  5. Connect brake lines to HCU and tighten line fittings to 19-23 Nm (170-200 in. lbs.)
  6. Fill and bleed brake system.
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