my m38a1, has a temp gauge problem.
after a while driving it moves up to 260 on gauge ,
i have cleaned the fittings at rear and the engine temp switch twice its 24volt and cut back the douglas connector thinking its a break in wire but problem stil there.
there is no over heating
its just a pest when out driving, any ideas on what to do.
thanks
oddball
TECHNICAL
- wilfreeman
- Jeep Legend

- Posts: 1079
- Joined: Sun Mar 12, 2006 6:00 pm
- Location: Richburg, SC
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M series gauges are notoriously unreliable. You can start with this troubleshooting guide from the downloads section http://willysmjeeps.com/downloads/instruments.pdf . There is a lot of info available in the downloads section.
Matt
1953 M38a1
1964 USMC M38a1
'51 USMC M100 trailer, '54 M100 trailer, '90 M101a1 trailer
Http://wilfreeman.wordpress.com (M38a1 build blog)
http://m38a1usmc.wordpress.com (USMC M38a1 rebuild blog)
1953 M38a1
1964 USMC M38a1
'51 USMC M100 trailer, '54 M100 trailer, '90 M101a1 trailer
Http://wilfreeman.wordpress.com (M38a1 build blog)
http://m38a1usmc.wordpress.com (USMC M38a1 rebuild blog)
- oddball
- Member
- Posts: 20
- Joined: Thu Mar 07, 2013 6:00 pm
- Location: Edinburgh/Scotland
- wesk
- Site Administrator

- Posts: 16467
- Joined: Sun Apr 03, 2005 6:00 pm
- Location: Wisconsin
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You should first troubleshoot the wiring, gauge and sender in accordance with the TB suggested above. If a component is not up to mustard the tests will reveal which component/s it/they are. Your symptom speaks strongly of a short in the wire between the gauge and the sender.
http://willysmjeeps.com/downloads/instruments.pdf
http://willysmjeeps.com/downloads/instruments.pdf
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules. ... _album.php
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules. ... _album.php