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It's been so long since I wired my RR that I'm just not confident in the conclusions I'm coming to while helping a friend try and get his RRC with Mazda SL35 engine running. I decided to go back to basics and draw up some schematics from scratch using a standard 3.9 RRC diagram as a foundation and working in the SL35 necessities. Was hoping anyone with solid knowledge could throw their eye over them and see if there's any glaring mistakes, and maybe they'd be of use to someone in the future. Note they're all standard RRC 3.9 [1990-ish] wiring colour codes save for the yellow to the preheater [which would be yellow with black tracer from the timer unit to glow plugs on a 1990 diesel RRC]. Also the injection pump cut off isn't included in either diagram. Haven't worked that out yet [any pointers where the glow plug/preheater relay low voltage wiring should be connected in the ignition welcome]. Thanks George Edit: forgot to mention, we can't get this thing to crank. The solenoid just ticks madly and there's the slightest attempt to turn from the crank. We've been using two batteries in rotation between car and charger and monitoring voltage. They both start with 12.3 but as soon as ignition is switched to 1 or 2 the voltage drops to low 11's. Is that normal? We even tried them in series at one point but it made no difference.