60 Series Voltage Problem
Submitted: Sunday, Aug 16, 2009 at 22:33
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Chad D
Hi
I have an 85 HJ60 with a 2H. The problem i am having is that occasionally i have whats to looks to be a voltage spike and both my temp and fuel gauge go up. The temp goes from its normal just under half to close to the top of the gauge and the fuel goes up aswell. This only happpens for a short moment and then they return to there usual positions and might not happen again on that trip or for a few weeks. I also watch the volt meter while this is happening and it doesn't seem to change. I have had the voltage regualtor replaced and electrics checked.
Has anyone else had this problem or know what could be causing it and how to fix it?
Reply By: Member - Fred B (NT) - Sunday, Aug 16, 2009 at 22:50
Sunday, Aug 16, 2009 at 22:50
Hi Chad,
can only think of one thing; check your fuses for the instrument circuit, you will probably find the tags on the fuses are oxidised/corroded which can cause problems with the circuits.
regards
AnswerID:
379268
Reply By: Dave B ( BHQ NSW) - Sunday, Aug 16, 2009 at 22:55
Sunday, Aug 16, 2009 at 22:55
I think the problem is in the circuit board in the back of the gauges.
The 60's are a bit like me and getting a bit long in the tooth now, and suffering from a few dodgy joints.
All the rattling around over the years and a bit of dust causes a few problems now and again.
I have had the temp gauge problem once, but not the fuel gauge.
Dave
AnswerID:
379269
Reply By: Member - Phil G (SA) - Monday, Aug 17, 2009 at 10:25
Monday, Aug 17, 2009 at 10:25
I know your exact problem - seen it on other 60series as
well as the one I owned.
You can fix the problem by replacing or fixing the fuel gauge, which is a separate item in the instrument cluster.
To explain: There is a primitive bimetallic voltage regulator that powers the fuel and temp gauges at about 7 volts. It can easily stick with time - cause the spike in the readings. This regulator is built into the fuel gauge itself, and is separate to the rest of the instrument cluster. If you are good at DIY, you can actually take the fuel gauge apart and clean up the contacts in the bimetallic regulator. My solution at the time was to replace the fuel gauge.
Cheers
Phil
AnswerID:
379294
Follow Up By: Chad D - Monday, Aug 17, 2009 at 13:06
Monday, Aug 17, 2009 at 13:06
Thanks very much for your reply.
Just one question. Do i need to replace just the gauge in the dash or do i replace both the gauge and sender in the
tank?
Cheers
Chad
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Follow Up By: Member - Phil G (SA) - Monday, Aug 17, 2009 at 18:35
Monday, Aug 17, 2009 at 18:35
Sender will be fine. Just replace or fix the fuel gauge.
I doubt that Toyota would still stock them new.
FollowupID:
646741
Reply By: greenant - Monday, Aug 17, 2009 at 10:57
Monday, Aug 17, 2009 at 10:57
Hi Chad D
As Phil says its a common problem
The issue is the internal voltage regulator that the temp/fuel gauge share. You can dismantle the gauge cluster and dress the points on the regulator or replace the module and or fuel guage.
Have done
mine and the only real hassle was disconnecting the speedo to get the instrument cluster out . I did have the way to do it with photos but at present cannot find where I saved it
Greenant
AnswerID:
379300