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I believe they used TL110 on the A1R to feed raw battery power from the LBCD to CB60 and on to the ECU… I have not seen it used referenced on the earlier A1 truck diagrams, but that doesn’t mean they didn't use it for something… on the A0 it went to the alternator F- terminal and fed a...

Tl110 on what year and model truck chassis? Or to be more specific what year and make wiring harness?

That is an A1 schematic, this is an engine out of an A1R... The TL's in question are not on that particular schematic...

I seem to recall something about an Input power filter on the trucks with ECU’s which may be where some of these are intended to attach. Short of someone being able to provide A1R wiring info, pulling the ECM connector and using an ohm meter to find the specific ECM pin and connector that these...

Im not finding any reference to them, but I don't have any A1R info. Since it is a C7 it may have come from an A1R? Another clue might be gleaned by tracing them back to the pins they connect to on the engine ECU. I noticed they all appear to be larger gauge terminals(3mm?). That will limit...

Max Where are the three cables physically located on the engine?