[DeTomaso] The latest adventures in the garage
Thomas Tornblom
Thomas.Tornblom at hax.se
Sat May 5 23:29:45 EDT 2007
Christopher Kimball skrev:
>
> Interesting thing about the sending unit--I touched the wire to ground as
> suggested and the needle did go to the right, which was good news, but when
> I tried my ingenious method of testing the thing by pouring boiling water
> into the coolant bottle (after siphoning out it's coolant first) the
> temperature gauge didn't move. Doh!
>
> I went to bed frustrated about that because I didn't want to run the car at
> all without a working temp gauge. Then, in the middle of the night it hit
> me--I had repainted the coolant bottle and lined the inside of its holding
> bracket so the new paint wouldn't get scratched. I suddenly realized by
> doing that, I had probably eliminated any ground the bottle may have had,
> which would be necessary for the sending unit to work. Sure enough, when I
> tested it with an ohm meter it didn't register 0, but something in between 0
> and infinity, so I knew that was the problem. I hooked a
> ground wire to the sending unit on the bottle and ran it to a good ground
> then tried my boiling water experiment again, and this time the needle
> registered just fine!
>
Move the temp sender from the water bottle to the block, where God
intended it to be.
Thomas
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