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Maybe that's why I have a battery drain down!? Speedo/odometer not working on my '90 745 automatic. I've delayed looking at the wiring to speedo sensor in the rear end because it seemed more important to troublshoot many possible causes of not being able to key start (Position III) . Difficult to sell the car when it's necessary to pop the hood and jump/hot wire battery cable end to starter terminal on solenoid. It's a new battery and I've topped it up w distilled H2O.
I'll check PDL and dome light too. Then move on to all fuses. I know I still have to check the red wire jct under the fuse tray for clean tight connections. Haven't been able to get that tray out yet. Seems the force required - afraid I'll break it. I order a new $4 fuse tray from Volvo dealer as back-up.
Oh, the logic of electrics!
These threads are so helpful. The School of the BrickBoard. Thanks to you all my teachers - I'm getting a beginner's degree in 240s & 740s. We had a saying in our hippie communes in the 60s & 70s "If you don't know, learn. If you know, teach".
And I now remember someone posting about elec shorts in turn signal/dimmer sw on steering column. Blue Hi/Lo light is always on dimly when ign is on, and works backwards when headlights are on. When lights are switched to bright the temp gauge shuts off. More clues to investigate. Love Hate. I need time for other things in life.
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