Question about 2000 Chevrolet Blazer
If the circuit board failed, would it still dart back and forth or would it just stop? How would I replace it, is it behind the dash or somewhere else? Thanks.
This sounds like it could be your problem. There is a TSB #3777 that deals with the following problem: The fuel gauge and temp. gauge are inop and the low fuel and battery lights are on. The PRNDL indicator is inop on A/T vehicles. These systems can be intermittent. When using a scan tool the inputs are normal when viewed on the power train data list, but read zeros when viewed in the I/P data list. The gauges will sweep when using a scan tool. This can be caused by an open in cicuit 241 to the VCM connector C4 pin 13. This is the ingnition 3 feed to the VCM. It is one of the inputs used to determine the ignition lock/switch position. When this circuit is open the VCM sees the switch as always in the crank position, while in this mode the class 2 serial data is in a reduced function state, the Tech 2 will still communicate with the various modules and no DTCs will set. The following is a matrix indicating what inputs are used to determine the ignition switch position at the VCM.
Check for B+ at the VCM connector C4 pin 13, this circuit 241 should only have battery voltage when the ignition switch is in the run position.
Note: Both the 2WD and 4WD S/T vehicles with a 4.3 L engine use fuse #15 (4WD) in the IP fuse block and the related wiring (Circuit 241) to the VCM for this crank input.
Safety Note: Before working on wiring be sure to ground yourself or static discharge may fry the circuit bored.
Posted on Dec 12, 2008
Chances atre if it was the whole board you whould not have a speddometer or anything. there are seperate modules on the board it sits behind the dash. when removing it you want to be careful. if you have a static charge and it discharges on the board you will fry it. i use a bracelet that has a longe wire with an alligator clip and i attach it to a ground that way the charge will ground to the vehicle body and not the board. please rate this thanks
Posted on Sep 01, 2008
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Posted on Jan 02, 2017
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