Guest RedCutlassSL Posted July 30, 2003 Report Posted July 30, 2003 Ok, when I start my car, all the dummy lights stay off. Once the car moves, the ABS and brakes lights come on. The fluid is full. Anybody have an ideas why this is happening? What can I check? Need help ASAP Quote
Redfox340 Posted July 30, 2003 Report Posted July 30, 2003 Correct me if I'm wrong, but doesn't all for wheels have sensor to detect wheel speed for ABS? If so, sounds like one is malfunctioning due to perhaps one is not sending a signal. - Erik Quote
Bolt_Crank Posted July 30, 2003 Report Posted July 30, 2003 I get that too, only accompanied by a sometimes extremely stiff brake pedal, so I jes unplugged my fuse for now... until I get the whole thing checked out... Quote
Panopticon Posted July 30, 2003 Report Posted July 30, 2003 make sure you guys don't have the PMIII ABS system. Ifyou do i bet its the pressure switch or accumulator bulb Quote
GnatGoSplat Posted July 30, 2003 Report Posted July 30, 2003 Correct me if I'm wrong, but doesn't all for wheels have sensor to detect wheel speed for ABS?If so, sounds like one is malfunctioning due to perhaps one is not sending a signal. :withstupid: Quote
Guest RedCutlassSL Posted July 30, 2003 Report Posted July 30, 2003 how can i tell if i have the pm3 system? Quote
GnatGoSplat Posted July 30, 2003 Report Posted July 30, 2003 how can i tell if i have the pm3 system? On a 95, you don't. The last year for the PM3 was 91. Quote
Guest RedCutlassSL Posted July 30, 2003 Report Posted July 30, 2003 well thats good, then how can i tell if a sensor is malfunctioning? Quote
Bolt_Crank Posted July 30, 2003 Report Posted July 30, 2003 what does a '93 run for brakes? o.o Quote
Bolt_Crank Posted July 30, 2003 Report Posted July 30, 2003 all u ABS people hey! my ABS fuse isn't in! Quote
GnatGoSplat Posted July 31, 2003 Report Posted July 31, 2003 Only way I can think of to test it is to: 1) Get pinouts for the ABS connector and locate all the wires that go to ABS sensors. 2) Disconnect ABS connector and connect leads of a multimeter set on AC millivolts to the 2 leads that go to an ABS sensor. 3) Drive the car with the multimeter connected. A correctly functioning sensor will read some small AC voltage. 4) Repeat steps 2 & 3 for the other 3 sensors. The one with the unusually low reading is likely to be the bad one. It's a lot of work, but that's the only way I can think of to test them. The easier way would be to take it to a dealer, he can read the codes and they will tell you exactly which sensor is bad. You have ABS VI and I'm pretty sure it can't blink out codes, so the dealer is the only one that will have the equipment to read them. Quote
Guest RedCutlassSL Posted July 31, 2003 Report Posted July 31, 2003 what else would you guys suggest? i know jack about abs systems, and i want to find the problem Quote
god910 Posted July 31, 2003 Report Posted July 31, 2003 You can just unplug the sensor and hook an AC meter directly to it. Spin the wheel and you should see a voltage. Since the voltage is so small it's actually easier to keep the meter on DC and watch it go +/- That's how we test them. If it's doing anything it's good for the most part. If the tone wheel has missing teeth or is really cruddy clean off the sensor and the wheel. If all is clean and there is a voltage on the sensor. You should be in good shape. Quote
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