Okay, so I tested the relays with a simpler method I found (two terminals to the power source and the other two via resistance meter). The relays 13 and 14 (taillight relay and starter cut) were fine. 11 and 12 are turn signal and power windows, none of which were affected so I didn't bother with that.
Under hood fuses all check out.
Under dash fuses were all over the place. Unless I'm not understanding this, I used the circuit tester and 1, 4, 6, 8, 9, 10, 12, 13, 14, 17, 18, 19, 20, 23, 24 were all unlit. Only a handful lit up the light. This makes no sense to me since a lot of those fuses power things like the ignition coil, radio power, key-less receiver unit, power windows, etc. And those all work! What the heck am I missing? The wiring diagram you listed has the headlight switch connecting to the main circuit which feeds down into things like the heater controls and such. But there's no relay on the board for that. Where is this relay? Or is that actually the headlight switch knob? And If so, how the heck do I test that?
Looking at this wiring diagram I got elsewhere, also for 03 CRV, shows a link between B3 and A15 (which I think it s typo and should be A3 and B 15, because both show G502 which looking at both wiring harnesses, is ground. But if the ground is simply a screw somewhere, how can it be a bad ground from a light bulb shorting?
Saturday, January 18th, 2020 AT 12:32 PM