Question:
I have a 2001 Peterbilt 379. I am having problems with the low air warning buzzer and light not going off. I have changed sensors and power board but with no change. Anyone having the same problem or have an answer to my problem please let me know. I am at wits end.
Answers:
My car was egged?
i drive a 2000 pete 379 and have been driving it since new. take the cover off down behind the brake and clutch where the low air switch is. look at the switches and see if you don't see signs of water. like the dust being moved around. pull the low air switch out and get a new one. before you replace it go to advance or autozone and buy a can of liquid tape. cover the switch with this liquid and let it dry and then coat it again. if you can not find liquid tape there go to home depot and look in the elec. section and get some coating compond that work good also just cost more. after you have done this replace the new switch and you will not have this problem again. i have had this truck since it was new and have put 620,000 miles on it and this problem drove me nuts for 3 years. every time i washed the truck or when it rained hard when the truck sat still the low air would come on and not go off. we have three of these truck built one behind the other and all 3 did the same thing till i found this liquid tape. since using this we have not replaced a low air switch since. the water get in side and shorts the switch out. good luck
Can anyone reccommend...?
maybe you have a air leak,
Steering rack??
I drove a 2000 Pete and one of the things I did was to increase the amount of max psi up to 125psi and have had no problems with the low air waring buzzer. and it might be a stuck valve in the air dryer, try testing the bleeder on the bottom of the air dryer.
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