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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 5123
Experience:  Owner at DJ Wilson
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1982 Mack low air buzzer and light don't work, Serial 001137

Customer Question

1982 Mack low air buzzer and light don't work
JA: What is the complete model and serial number of your machine?
Customer: Serial 001137 model rws786ls
JA: Are you fixing this yourself? What have you tried so far?
Customer: Don't have a wire diagram. Need to know if there is a switch for power
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: No
Submitted: 9 months ago.
Category: Medium and Heavy Trucks
Customer: replied 9 months ago.
Can't find were it gets power from
Expert:  Daniel Wilson replied 9 months ago.

Hi my name is***** this is a 1982 it will be difficult to get any wiring diagrams for but to troubleshoot this using a test light, test for power on both sides of the fuses/breakers with the key switch on. Any fuses/breakers with power only on one side are bad. In this circuit there is an air pressure switch usually mounted on or near the foot brake valve.. Test for continuity of the switch, check the wiring for damage, and test for power through the circuit and to the switch and buzzer. Let me know

Customer: replied 9 months ago.
We checked every switch. Don't know were the buzzer gets power. Two switches by foot valve are for brake lights. It should be a two prong switch.
Expert:  Daniel Wilson replied 9 months ago.

There were 3 common areas Mack mounted the low air switch. Drivers side under the dash and center dash near the maxi switches, and some cases outside on the firewall. Something this old might be easier to wire in a universal buzzer and switch with an inline fusible link if it hasnt already been done..

Expert:  Daniel Wilson replied 8 months ago.

Hi, Did you get this resolved?

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