Hey all, first post. I did a search on gas gauge not working and it only gave me two threads which didn't address what I'm looking for.
I own three Toyota trucks presently and am decent with the drivetrain and suspension stuff, but electrical issues just boggle my mind.

The at issue truck is an '89 2wd Toyota Pick up with 22re and column shift automatic trans. Recently while driving, I noticed my fuel gauge and blower motor for the heater stopped working. I also noticed my trans works perfectly, but won't go into overdrive. About three years ago, I had to replace my electronic OD solenoid-so I don't think replacement of that part is at issue.

My question is wondering if there is a relay or solenoid (or something) somewhere along the system that may have taken these (OD solenoid, blower motor, gas gauge) out at the same time?

I've had the truck since new, so I know most of the electrical system is original. I'm pretty sure how to address each of these issues individually, but since these seemed to have happened simultaneously- I am hoping I don't have to repair each of them. Can anyone point me in the correct direction?

Thanks for any help.

 

I hate to rain on your parade unless you have a poor ground issue

All those problems are on different circuits

It might be possible physical damage to the harness might take out the Overdrive and fuel gauge.

 

Thanks for the info! Any bit helps. I own a multimeter, so is there a way to check the harness or to locate a potentially bad area?
With electrical stuff, I'm just not sure how to attack it.

 

I would have posted earlier, but I was away! Your fuel guage and blower motor problems are probably related. They have a common ground point "E" located under the drivers side kick panel. The OEM radio is tied to this as well, but more than likely this has be replaced with an aftermarket unit. I would remove this connection, thoroughly clean the ring terminals and contact area, reassemble and see if this solves the first problem.
Your overdrive issue might be a separate problem, you already said that you transmission has solenoids, so it is ECT (electronically controlled), so here is the breakdown of the operation.
During driving. The TCCS computer selects the shift for each gear which is the most appropriate to the driving conditions, based on input signals from the EFI water temp. sensor (THW-terminal #4 of connector T3) and the transmission speed sensor (SP2-terminal #16 of the T4connector). Current is then sent to the ECT solenoids. 1st gear current flows from S1 (Blue/Red T4 #7) to terminal #3 (connector E3) to terminal #4 (Brown/Black) to ground. Ground and continuity to the #1 shift solenoid causes the shift.
2nd gear same as first gear plus current also flows from terminal S2 (Red/White T4 #6) to terminal #2 (connector E3) through solenoid #2 to terminal #4 to ground.
3rd. gear, no continuity to #1 solenoid only the #2 causing the shift.
Overdrive, there is no continuity to either #1 or #2 solenoids causing the shift. Solenoid #3 is the torque converter lockup solenoid and solenoid #4 is only in 4X4 transmissions. It controls when a shift can be made from H4 to L4.
If your transmission is shifting properly in the lower gears od should be working as well
So now I'll ask a dumb question.... could your problem be as simple as the OD off light being burned out in the combination meter and your OD main switch being in the off position?