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Any Procedures For Testing an ABS Wheel Sensor?

Posted

1999 3500 2WD with 4 wheel ABS

Got an ABS warning light (along with a brake warning light). Rear sensor was replaced by previous owner - no fix. Took to dealer to run the diagnostics, results point to a R/H front ABS wheel sensor. Before I order the part (OEM MSRP = $200), I was wondering if there was a method to check the sensor with a meter or something. Is it possible that the sensor is just dirty with brake dust, or do the connectors get corroded? I guess I could compare the ohms resistance reading from the rt front with the value taken from left front. Any other tips or tricks would be appreciated.

Thanks,

Joe in St Louis

--- Update to the previous post...

Today I did some investigating. First I did a visual to ensure the wires didn't looked damaged (no problems), then disconnected the QD on the Rt fender well & tried to take a resistance reading on the sensor (open-no continuity). Went ahead & removed the Rt front tire/caliper/hub to expose the sensor. The sensor was cracked wide open in two places - looked like it had filled with water which froze & busted open. There also was ferrous magnetic fuzz all over it. I think I found my problem.

Cheapest replacement part was from Mopar Wholesale Parts

http://www.mopar-wholesale.com/mopar-parts-online?gclid=CNqhvfWaxKUCFY64Kgod9zrIYg

at about $135 + $12 shipping. OEM parts at a good price, or so it seems. Plan on calling tomorrow & ordering.

Joe in St Louis

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I guess that would explain why it quit.....:smart:

rockauto.com has them for $50. i dont know aything about the quality versus what you found. i have bought a few things from them in the past and have not had any problems yet.

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Thanks Dripley for the heads-up. I looked at Rock Auto but the sensor I needed (3500, 2wd, rt front w.o. solid front axle) was listed at $172.79. I'm sticking with $135 from Mopar Wholesale.Joe in St Louis

been looking up a 02 4wd so long i didnt think there was any thing else you would need to look up:cookoo:. sure is a big price differance between yours and mine.

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Yesterday the new sensor showed up. Bolted it on, plugged it in, and the abs light is no longer illuminated - didn't even have to drive it down the road! Glad to have it fixed.I did take a resistance reading on the sensor prior to installation. I only have a digital multimeter, and when taking a reading in the ohms function it registered open, but I've had problems before with taking readings on ignition coils using a digital VOM - need to get a Simpson meter. I switched it to the diode check function and was able to read a resistance of 1.106 ohms.So for troubleshooting a sensor, check for continuity, then physical damage.Joe in St Louis

happy to hear you got it fixed.

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Welcome To Mopar1973Man.Com LLC

We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.