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TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board
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FLD120 no start, no cab gauges
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<p>[QUOTE="GrapeApe, post: 4784185, member: 104665"]Even if the relay is good, if it doesn't have power or ground to activate it, it wont work, which is why a said to try and jump it. Everything that gets key on power comes through that relay, so that's where I'd focus. You said you have good power and ground to the ECM, so I'm guessing that the ignition power is not making it to the ECM to turn it on. That comes from the ignition relay, which also powers all the other ignition on circuits.</p><p><br /></p><p>On the ignition relay, you should have power on the 30 terminal. 85 and 86 are the coil to activate the relay, so one should have power and the other ground with the key on. The 87 terminal powers all the ignition circuits and relays.[/QUOTE]</p><p><br /></p>
[QUOTE="GrapeApe, post: 4784185, member: 104665"]Even if the relay is good, if it doesn't have power or ground to activate it, it wont work, which is why a said to try and jump it. Everything that gets key on power comes through that relay, so that's where I'd focus. You said you have good power and ground to the ECM, so I'm guessing that the ignition power is not making it to the ECM to turn it on. That comes from the ignition relay, which also powers all the other ignition on circuits. On the ignition relay, you should have power on the 30 terminal. 85 and 86 are the coil to activate the relay, so one should have power and the other ground with the key on. The 87 terminal powers all the ignition circuits and relays.[/QUOTE]
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TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board
Forums
>
The Garage
>
Trucks [ Eighteen Wheelers ]
>
Commercial Truck Forums
>
Freightliner Forum
>
FLD120 no start, no cab gauges
>
Reply to Thread