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#1
11-28-2004, 10:54 AM
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3rd Brake Light
3rd brake light not working at all I have 12v input to the Ballast resistor, how can I tell if the Ballast is bad or the lamp . Tese are expensive parts and need to know if their is a way to troubleshoot the ballast
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#2
12-29-2004, 08:02 AM
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Re: 3rd Brake Light
K2 CHECK THE VOLTAGE AT THE LAMP CONNECTOR
Hi-Mount Stoplamp C410 Apply the brake. Measure the voltage between hi-mount stoplamp C410, circuit 569 (DG), and ground. Is the voltage greater than 10 volts? Yes GO to K3 . No REPAIR circuit 569 (DG). TEST the system for normal operation. K3 CHECK CIRCUIT 57 (BK) FOR OPEN Measure the resistance between hi-mount lamp C410, circuit 57 (BK), and ground. Is the resistance less than 5 ohms? Yes REPLACE the hi-mount stoplamp bulb. TEST the system for normal operation. No REPAIR circuit 57 (BK). TEST the system for normal operation
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