Ram 2500 Cummins 1999

From : the gonz

Q: hello and happiness to all. i have a 1999 ram2500 5 speed and the abs light and brake indicator light came on. since then the speedometer only fuctions after the vehicle reaches 30 mph. everything else works fine including the cruise control. thanks and happiness to all. mike .

Replies:

From : mike simmonsnosey

thanks. i was misreading the manual. mike its easy to do with the crazy footnotes ^. i had to look at mine twice to make sure i understood it. mike thanks for all of the help i recd some great tips. i do need clarification on the following according to my manual for my 2003 ram im suppose to use the b 3750 mile oil change interval service if one or more of the following apply day or night temps are below 32 f stop and go driving extensive idling drive in dusty conditions short trips less than 10 miles trailer towing or more than 50% of your driving is at sustained high speeds during hot weather. it says that most people will fall under this b service. this is for the so engine 250 hp not the 235 hp california emissions version. iron mike the b schedule calls for oil changes every 7500 miles unless you have a ca vehicle..... read the footnotes carefully! mike but just maybe there is a diesel owner that does not have a 2003 and has a nagging question about oil filter considerations and the heading of this thread cummins oil filter question not year specific might just peak his interest. makes sense... i just didnt want the o.p. taking the part numbers from that tsb and using them on his truck. .

From : nosey

john jacob wrote check the vacuum detector switch. on the 96 it is located on the inner fender near the master cylinder. this switch lets you know if the brake boost vacuum is low. sometimes those switches get clogged and read low vacuum. this will light the abs and the brake light. jj rams with the cummins engine use a hydroboost brake system and dont have that vacuum switch. .

From : john jacob

i wish my cummins used hydroboost. my 96 has a vacuum pump to drive a brake booster. my brake booster has an air leak. i dont have boost for about 4 second when i start the engine. replacing the check valve didnt fix the problem. jj nosey wrote john jacob wrote check the vacuum detector switch. on the 96 it is located on the inner fender near the master cylinder. this switch lets you know if the brake boost vacuum is low. sometimes those switches get clogged and read low vacuum. this will light the abs and the brake light. jj rams with the cummins engine use a hydroboost brake system and dont have that vacuum switch. .

From : nosey

john jacob wrote i wish my cummins used hydroboost. my 96 has a vacuum pump to drive a brake booster. my brake booster has an air leak. i dont have boost for about 4 second when i start the engine. replacing the check valve didnt fix the problem. jj dc began installing the hydroboost system in cummins equipped rams in 1996. your truck may have been built before they switched over to that system. http//www.dodgeram.org/tech/specs/brakespecs.htm .

From : hattmakr

the gonz bigdog99@futura.net writes hello and happiness to all. i have a 1999 ram2500 5 speed and the abs light and brake indicator light came on. since then the speedometer only fuctions after the vehicle reaches 30 mph. everything else works fine including the cruise control. thanks and happiness to all. mike mike i cant tell if you have a question or a problem with your 99. if you need a solution to the abs/brake light situation you describe try replacing the wheel speed sensor located on top of the rear end. aw .