This is an improved and more educated version of my original post. Just got my intermittent wiper function working again, but it does some strange stuff.
First off, when I turn the ignition on, the handbrake warning light comes on for a few seconds, then fades out slowly (isn't this what the seatbelt light is supposed to do?). I know it's hooked up right, because when I pull the handbrake, the light comes on. Also it matches the diagram I have (pink wire and black/gray wire going to handbrake light). Now, if I disconnect the seatbelt timer device, then short the brown and black wires together at the seatbelt device connector (device itself still totally disconnected), the handbrake light comes on AFTER I once again un-short the wires, then fades out after a while (like I'm triggering another device somewhere). If I maintain the short for a while, I blow a fuse (#5, the one responsible for intermittent wipers....interesting).
One thing bothers me about the diagram: it looks like at the connector block for the warning lights, the gray/black wire that goes from the handbrake switch itself to the handbrake warning light, is connected via an orange wire to terminal #1 of the intermittent wiper device. When I disconnect the intermittent wiper connector and check the pin on the end of that orange wire (handbrake off, ignition on), I read 12 volts! That means 12 volts is going to the ground-end of the handbrake light for no apparent reason, and then gets shorted directly to ground when the handbrake is engaged. This can't be right?!?!??? And it still doesn't explain why the handbrake light would come on, since the other end of the light is connected to the pink wire for voltage....two positive leads and no ground. But then when the handbrake light is turned on only by the Mysterious Source, neither of the terminals going to the light are showing a connection to ground....but if I measure between them, I get voltage. ??????? The battery is the only source of voltage in this case, what could that light possibly ground to besides the common ground of the vehicle/battery?!?!
The handbrake light thing is an annoyance at best, but there are other issues: with the engine off, if I set wipers to intermittent, sometimes the fuel pump will run briefly when the wipers start their upward path (but not always). With the engine/pump running, the intermittent setting is very slightly slower. Something is NOT right........but it's taken me several hours just to reach this point, and I'm becoming quite baffled. Any ideas?
First off, when I turn the ignition on, the handbrake warning light comes on for a few seconds, then fades out slowly (isn't this what the seatbelt light is supposed to do?). I know it's hooked up right, because when I pull the handbrake, the light comes on. Also it matches the diagram I have (pink wire and black/gray wire going to handbrake light). Now, if I disconnect the seatbelt timer device, then short the brown and black wires together at the seatbelt device connector (device itself still totally disconnected), the handbrake light comes on AFTER I once again un-short the wires, then fades out after a while (like I'm triggering another device somewhere). If I maintain the short for a while, I blow a fuse (#5, the one responsible for intermittent wipers....interesting).
One thing bothers me about the diagram: it looks like at the connector block for the warning lights, the gray/black wire that goes from the handbrake switch itself to the handbrake warning light, is connected via an orange wire to terminal #1 of the intermittent wiper device. When I disconnect the intermittent wiper connector and check the pin on the end of that orange wire (handbrake off, ignition on), I read 12 volts! That means 12 volts is going to the ground-end of the handbrake light for no apparent reason, and then gets shorted directly to ground when the handbrake is engaged. This can't be right?!?!??? And it still doesn't explain why the handbrake light would come on, since the other end of the light is connected to the pink wire for voltage....two positive leads and no ground. But then when the handbrake light is turned on only by the Mysterious Source, neither of the terminals going to the light are showing a connection to ground....but if I measure between them, I get voltage. ??????? The battery is the only source of voltage in this case, what could that light possibly ground to besides the common ground of the vehicle/battery?!?!
The handbrake light thing is an annoyance at best, but there are other issues: with the engine off, if I set wipers to intermittent, sometimes the fuel pump will run briefly when the wipers start their upward path (but not always). With the engine/pump running, the intermittent setting is very slightly slower. Something is NOT right........but it's taken me several hours just to reach this point, and I'm becoming quite baffled. Any ideas?