[DeTomaso] The latest adventures in the garage

[Thomas Tornblom]

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