Dodge Repair Questions? Ask a Mechanic for Answers ASAP
The height sensing proportioning valve is used on 2500 model vehicles with RWAL.(Rear Wheel AntiLock brakes) The valve is mounted to the left frame rail above the rear axle. The valve has an actuator lever connected by a link to the left lower shock bracket. you will see the brake lines going in and out of it
you will want to check if the valve is still connected and free if you have lifted the truck or modified it in any way from stock it WILL effect how the valve operates
ok first lets have the whole story, when did your problem actually start and was anything done just prior to the problem.
what is the EXACT problem and may I have the vin so I can see exactly the type of abs system your truck was built with, all th e2500 pick up's I have seen have only had RWAL and those ALL have a height sensing proportional valve ONLY full 4 wheel ABS will not have any proportional valve so I need to know how the truck was originally built and the VIN will allow me to decode that
your missing a digit on the vin the numbers at the end must be 6 digits NOT 5.
I do need to know if the truck was built with full 4 wheel abs or just rear wheel abs because of the differences in the way the module would work, full 4 wheel abs uses the abs module to control brake fluid flow and rear wheel is far simpler and only diverts fluid from the rear wheel so it MUST use a proportioning valve and a bad rear wheel abs module will likely NOT cause the rear wheels to work harder and skid, however bad or incorrect (to small or large diameter) wheel cylinders can easily cause the rear wheels to skid with no load on the rear of the truck, there was an old service tip about matching the wheel cylinders to the use of the truck to prevent rear wheel lock up when these were new