testing coolant temp gauge sender for 80/90/4k/4kq/CGT

[Brady Moffatt]

----- Original Message -----
From: <Jpinkowish at aol.com>

> Dave,
> If your coolant temp gauge is reading low, the sender is really easy to
test.
> I'm going to assume that the 90q coolant temp gauge sender is identical to
> the 4kq sender.
> Using a multimeter, these are the resistances you should see:
>
>     TEMP(degF)          RESISTANCE(ohms)
>     <68 (20C)                   >1000
>       68    (40C)                     1000
>      104(60C)                       500
>      140(80C)                      180-200
>      194(90C)                        75-100
>      230(110C)                       45-60

OK, just got the Bentley in front of me (it lives in the glove compartment
along with the phone books of 6 major cities and a full sized spare), and as
I suspected, this table is incorrect. Living in Canada, I do C to F
conversions all the itme. Here's the correct one:

temp,                    resistance
68F (20C)           1000
104F (40C)         500
140F (60C)         180-200
194F (90C)         75-100
230F (110C)       45-60
248F (120C)       35-45

This figures are for the digidash cars, but on page 90.5, they have more
general figures for the analogs that more or less correspond with the above.

Cheers,
Brady Moffatt
Montreal, Quebec, Canada
86 4ksq, 280,000km
72 Datsun 240Z, 180,000 miles