1998 740 the speedometer, stopped working, abs and traction control lights on, power steering not working

What it looks like: The traction control warning light typically takes the form of the acronym "TC." Sometimes this light is a small illuminated picture of a car losing control What it looks like: The traction control warning light typically takes the form of the acronym "TC." Sometimes this light is a small illuminated picture of a car losing control. How this system works: Traction control uses wheel speed sensors to detect when one or more of the car's wheels lose grip and traction. When the system registers a loss of traction in one or more of the wheels, a computer will limit power to the wheels that are still in solid contact with the road to prevent a skid. Common reasons for this to happen:

• ABS is malfunctioning: Traction control and ABS (anti-lock braking system) often share the same control module and internal self-diagnostics system. As a result, sometimes an issue in the ABS can trigger the traction control light. If this is the case, then both the ABS and Traction Control lights will be on.
• Broken wheel speed sensors: Wheel speed sensors are usually in the wheel bearing assembly, and determine the rate at which each wheel is moving. The sensors relay that information to the traction control module, which determines whether or not power needs to be shifted. Wheel speed sensors can get dirty or damaged and stop working, which prohibits the traction control module from knowing when to enable the system.Traction control module is faulty: The traction control module - which, again, is often shared with the ABS - can malfunction and break altogether, causing the system to stop working. What to expect: A top-rated mobile mechanic will come to your home or office to determine the source and cause of the traction control issue, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs. How important is this service? It's important to have the traction control issue investigated as soon as possible, as adverse driving conditions can arise at any time. While your car is unlikely to incur further damage from a faulty traction control system, it won't be safe to drive in rain, snow, sleet, or other inclement weather, or even possibly through pools of water on the road. Furthermore, the issue that is causing the traction control light to illuminate could also be impacting the ABS.

Some vehicles speedometer works off the ABS wheel sensors. Have the codes checked for the ABS system. Check the fuses for the ABS also.

Service Stabilitrak, Traction Control lights ON, alone with check ...

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Jul 9, 2012 - I have a 08 Equinox with 79000 miles on it, for the last few weeks or soI've been having the service traction control/ service stabilitrak light ... HELP - Service Stabilitrak & Service Traction Control - Chevrolet ...
Aug 30, 2011
Service Traction Control - Stabilitrak and ABS light, Help ...
Feb 12, 2011
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How To COMPLETELY Disable Traction/Stabilitrack Control ...

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How to completely disable traction control on gm/chevy trucks and suv's. ... I got to anaheim the light of the ...

Has anyone ever had the service stabilitrak, service traction ...

look listen and dance not matter how you performance keep it calp and trust it

check the body control module under the dash

You need to replace the traction control module located on the ABS pump. There are places in the US where they will rebuild it for you with warranty for about $150.
Its tricky to get off (you need to remove the rad hose between the battery and the pump to get to it, but don't disconnect the ABS module, just the TC module mounted at end of the ABS unit (has a bunch of brake lines coming out if it).

The power steering is variable assist, relative to the speed of the vehicle, so if the speedo doesn't work, then the PS won't and you should have TC and ABS lights on. The electrical connectors to the module are tricky to remove. don't force them. One connector has a sliding lock bar.

If the ABS (and likely the traction control) light came on at the same time that the speedometer stopped working, you likely have a faulty wheel speed sensor at the right rear wheel. You can test this by swapping the two rear wheel speed sensors (ABS sensors). If the speedometer then works (but the ABS & Traction control lights stay on), replace the sensor that is now at the left rear (was at the right rear). If no change, you may have a fault in the ABS & Traction control - control unit.

Rear wheel speed sensor at www.bavauto.com

http://www.bavauto.com/shop.asp?HC1=0&Htarget=search.asp&HCY=2001&HCM=330i&SearchStr=rear%20abs%20sensor

no it does not; this is a massive short in the electrical system and, requires the services of an auto electrician like myself.
take the car in to an ASE certified auto electrical shop and, stop spending money on temporary fixes
the technicians can read the schematics and, fix your car right

use a scanner to check the abs system . most of the time the abs brakes and traction control system work together. your cruise control . unit has a servo motor .in front right fender well. check the fuse and relay also the cruise control brake release switch. and the brake light switch.if all is good you have a cruise control module problems. dealer ship job.

I have the 2000 Cadillac Catera Sport and I had the same problem. ABS, TC light and no speedometer and odo. I thought it was an electrical problem however I solved the problem by refurbishing the ABS Module. If you bring to the dealer it will cost you $3,000. You can have your ABS module rebuilt try modulemaster.com they do it for about $200 I believe. I got mine fixed because a friend of mine removed them and soldered some loose connectors together. All it cost me was a case of beer! It worked for my car just a suggestion for you guys. My ABS Module was a Bosch 5.3. Hope this helps!