cruisecontrol Posted July 19, 2018 Share Posted July 19, 2018 No part number visible, I think it’s a starter solenoid but when I search for that I don’t get anything that resembles it. It’s a 1990 3.0 EFI Quote Link to comment Share on other sites More sharing options...
Derek up North Posted July 19, 2018 Share Posted July 19, 2018 It does indeed look like a 'starter' solenoid. In this case, it looks like it's been wired in to act as an 'isolator' for your house battery. Got a multimeter handy? Quote Link to comment Share on other sites More sharing options...
cruisecontrol Posted July 19, 2018 Author Share Posted July 19, 2018 Hi Derek, yes, I do have a multimeter but are you saying that it no longer functions as a starter solenoid ? I can take a photo of the whole engine? ?♀️ Quote Link to comment Share on other sites More sharing options...
RVdaytrader Posted July 19, 2018 Share Posted July 19, 2018 It looks just like the battery isolator in my 1989 seabreeze. Quote Link to comment Share on other sites More sharing options...
cruisecontrol Posted July 19, 2018 Author Share Posted July 19, 2018 Thank you, rvdaytrader, I think you are right! Derekupnorth said so too... so it’s back to the drawing board for the answer to the original starting issue....?♀️ Quote Link to comment Share on other sites More sharing options...
Derek up North Posted July 19, 2018 Share Posted July 19, 2018 I think you'll find the starter solenoid is attached to the side of the starter. Quote Link to comment Share on other sites More sharing options...
Maineah Posted July 19, 2018 Share Posted July 19, 2018 Toyota starter solenoids are inside the starter that one you pictured is the isolator relay if your coach battery is charged do touch it! If it just clicks then starts the problem is inside the starter it is a simple fix but auto parts store will try to sell you a starter if you have a auto electrical shop in town they will know how to fix it. Quote Link to comment Share on other sites More sharing options...
Derek up North Posted July 19, 2018 Share Posted July 19, 2018 Please describe the symptoms. Quote Link to comment Share on other sites More sharing options...
MikeOver Posted July 26, 2018 Share Posted July 26, 2018 Starter problems in those years usually start with a "click" sound instead of cranking ... this is caused by a worn out contact in the starter solenoid 3 dollar part and easy to install Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted July 27, 2018 Share Posted July 27, 2018 (edited) that solenoid is activated when the ignition switch is on -it routes 12vdc from the start battery to the house battery - it trickle charges your house battery whenever the ignition key is on - it looks like a ford starter solenoid from days gone by - but it has one big difference, it is designed for low draw/ continuous duty. The oldford starter solenoid is designed for high draw/ short duty cycle. If you take a multi tester you should always have 12vdc on the side going to starter battery. With the Key On, you should have 12vdc on both sides. maybe 1/10 of volt drop on the down stream side. The little wire from the small terminal probably is spliced into the windshield wiper hot wire. There is probably a circuit breaker before the solenoid and another before the house battery Attached is a pic of the box & receipt where I replaced mine years ago. Edited July 27, 2018 by DanAatTheCape Quote Link to comment Share on other sites More sharing options...
neubie Posted July 27, 2018 Share Posted July 27, 2018 Yup. Isolator. Have one too. Coach is disconnected from truck for now during reconstruction, so this is entirely out of circuit for me. As long as you dont want to trickle charge the house battery from the truck alternator it can be disconnected and stay disconnected, or at least until you diagnose the issue. Both ends carry 12v, so if you disconnect just at the isolator then dont leave the wires uncovered. Quote Link to comment Share on other sites More sharing options...
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