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South Central Alberta | A friend has a Duramax in cube van and engine quit on the road. Code U1800 I believe is present. Power to FICM seems to be the problem. Fuses good, no power to terminals #118 and #119 on C2 connector. As well as #3 and #5 on C1 connector. Haven't found break in the wiring yet.
Are these terminals supposed to be live with key on and engine off? Supplying power back through one of these terminals doesn't power up the others.
TIA | |
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Duramax will not start
