Fun problem with my truck tonight. 1990 22re pickup. Arrived back from an 8 hour drive. Dash, side marker, and tail lights won't turn off. Slamming the door helped, but only somewhat. Bashing on the dash also helped, but with some buzzing and a bit of time, lights all came back on. Buzzing came from a relay near the main fuse block in the driver's side kick panel. Round silver thing, part number 90987-01003 on it (Toyota part number) from Denso. I pulled it out and the lights went out, which is good. Do the relays fail with these symptoms or is it a loose ground or a short somewhere else? I don't mind replacing the relay if need be, because it is probably 32 years old.
marker lights/tail lights relay (1 Viewer)
- Thread starter jgranthevagrant
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
my guess is a bad switch.
- Thread starter
- #4
So the relay is not likely the problem? Which switch might be the culprit? Ignition? I will be looking at the wiring diagram in the FSM. Pouring rain right now so I'm not keen to get out there.
- Thread starter
- #6
It stopped raining for a bit so I went out for a look. Plugged the relay back in. Lights stay off, at least so far. There definitely could be moisture as the whole truck is damp from driving in pouring rain. I tested tail, brake and signal lights. I think the headlights are on a different relay, something to do with daytime running lights. I forgot to try light switch on the stalk for tail and marker lights. Headlights do turn off, which is good. I don't want a dead starting battery. I will keep digging in the next little while.
