The gauge calibration could be off also, I had that happen with an oil pressure gauge. It would not move off L until I got it loosened up and adjusted the little tabs inside. It passed the ground test but would not respond to the sender.
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I have a 71 FJ40 with a 2nd generation cluster and a F1.5 engine from a 73 that I've been rebuilding. It has an early style Temp Sending Unit that should match my cluster. When off, the needle sits past H as it should. When on and the engine warmed it, it doesn't move to an appropriate spot on the gauge. If I ground the wire from the gauge straight to the battery, the needle goes straight to C, take it off and goes back past H. Is there a way I can test an early Temp Sending Unit? I read through this and found OHM reading for the later units, but didn't see any numbers for the earlier sensors. I've gone through enough money on this project and the early sensors are over $40, more than I'd like to spend just guessing. With engine warm and running the resistance fluctuates rapidly but stays between 45 - 60 between the top of the sensor and the block. I also measured between the top of the sensor and the side of the sensor, similar resistance.
Rudi are you still sucking air up there? Coen Wubbels of LandCruising adventure is in Khazakstan and trying to contact you, asked me to help. Hope all is well with you, all is good in Cuenca.I don't know why you made that jumper.
The track from the top stud FUEL gauge to the right stud from the TEMP gauge looks good to me.
Did or didn't you get that same voltage on the right stud from the TEMP gauge?
The picture in my previous posting (#610) represents the circuit and how it works and is connected.
Update: I connected the gauge to power as noted above and my temp gauged pinned itself to H. Is this an indicator of a bad temp sensor?
What exactly did you do? There is no need to make jumpers or bring voltage to a point for testing.
If your gauge is too long pegged in the corner, you run the risk of burning it up.
Those gauges are NLA !!!
Hi Rudy, I might have to rethink this solid state voltage regulator ida, we have the temperature transmitters fail repeatedly. Might be too much constant current destroying the sender, I might try a solid state flasher set at 50% duty cycle.Nice job. If you want the voltage a bit lower, you can put a diode in series. A diode drops the voltage by 0.6V so you'll get 7.2 Volt.
Rudi
Have you posted in the Wanted classifieds here on MUD?Hi I’m looking for a cluster speedometer .no. 83100-60071, can anyone help me out please. Ireland
I have a few. They all need to be cleaned up and tested. But they should be good here is one.Hi I’m looking for a cluster speedometer .no. 83100-60071, can anyone help me out please. Ireland
I have a few. They all need to be cleaned up and tested. But they should be good here is one.
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Absolute marvel piece this thread is! i have been trying to restore my old 1970 fj45 cluster back to working order after the previous owner put aftermarket ones in. Does anyone have photos from the back? my fuel gauge has three bolts but the top on looks like he has drilled a hole for it in the rear of the cluster so i can't work out if it is the original gauge to match with the sender unit?The 2nd generation from March ’69 till Sept. ‘72
The OIL and CHARGE lights are replaced by gauges
[URL="http://i1112.photobucket.com/albums/k490/ruud_coco/Toyota%2040%20series%20clusters%20fronts/1970_2.jpg"][URL="http://i1112.photobucket.com/albums/k490/ruud_coco/Toyota%2040%20series%20clusters%20fronts/1970_2.jpg"][/URL][/URL]
[URL="http://i1112.photobucket.com/albums/k490/ruud_coco/Toyota%2040%20series%20clusters%20fronts/1971feb.jpg"][URL="http://i1112.photobucket.com/albums/k490/ruud_coco/Toyota%2040%20series%20clusters%20fronts/1971feb.jpg"][/URL][/URL]
[URL="http://i1112.photobucket.com/albums/k490/ruud_coco/Toyota%2040%20series%20clusters%20fronts/1972june.jpg"][URL="http://i1112.photobucket.com/albums/k490/ruud_coco/Toyota%2040%20series%20clusters%20fronts/1972june.jpg"][/URL][/URL]
Rudi
@ToyotaMattAbsolute marvel piece this thread is! i have been trying to restore my old 1970 fj45 cluster back to working order after the previous owner put aftermarket ones in. Does anyone have photos from the back? my fuel gauge has three bolts but the top on looks like he has drilled a hole for it in the rear of the cluster so i can't work out if it is the original gauge to match with the sender unit?
Here is the back of a 70 cluster. My guess is someone put a later model fuel gauge into the cluster. The later model fuel gauges had 3 posts. Let me know if you need the correct gauge for your cluster. I am sure I have a few in my stash.Absolute marvel piece this thread is! i have been trying to restore my old 1970 fj45 cluster back to working order after the previous owner put aftermarket ones in. Does anyone have photos from the back? my fuel gauge has three bolts but the top on looks like he has drilled a hole for it in the rear of the cluster so i can't work out if it is the original gauge to match with the sender unit?
Yeah thats the exact photo i have been looking for! I was pretty sure mine was tampered with! I have 2 gauges now for mid 70's which are wrong for mine so if your willing to sell one i'd be grateful as i can't find any for a 70 anywhereHere is the back of a 70 cluster. My guess is someone put a later model fuel gauge into the cluster. The later model fuel gauges had 3 posts. Let me know if you need the correct gauge for your cluster. I am sure I have a few in my stash.
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I will check my stash and pm youYeah thats the exact photo i have been looking for! I was pretty sure mine was tampered with! I have 2 gauges now for mid 70's which are wrong for mine so if your willing to sell one i'd be grateful as i can't find any for a 70 anywhere