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Haydn Engine Temp TM2 not reading temperature?

Posted: Wed Nov 18, 2020 12:12 pm
by Donnie
Morning all, been getting on with several jobs on the bongo having had a few days off and one of these was to relocate the haydn TM2 engine temperature monitor so I cut the double wires within a foot of the monitor, relocated it in a better location and reconnected the wiring (the right way round) with male/female bullet connectors.

Now when ignition is on the readout sits at 001 :-(

Anyone got any ideas?

Re: Haydn Engine Temp TM2 not reading temperature?

Posted: Wed Nov 18, 2020 12:44 pm
by Donnie
Ahhhhh, I may have answered my own question by finding http://enginewatchdog.com/tm2_installation.html

I made the assumption that each wire was a single core essentially, whereas it's a wire within a wire. Just bared it all off and checked with temporary twists and it reads correctly now! Silly me!

Re: Haydn Engine Temp TM2 not reading temperature?

Posted: Wed Nov 18, 2020 2:20 pm
by Bob
Well done, easy fix. :)

Re: Haydn Engine Temp TM2 not reading temperature?

Posted: Wed Nov 18, 2020 3:35 pm
by Donnie
Yep, thankfully!

Re: Haydn Engine Temp TM2 not reading temperature?

Posted: Wed Nov 18, 2020 7:31 pm
by haydn callow
Not a good idea to cut the sensor wire ! It’s a shielded wire and this should be maintained after rejoining .

Re: Haydn Engine Temp TM2 not reading temperature?

Posted: Sat Nov 21, 2020 2:26 pm
by Donnie
haydn callow wrote: Wed Nov 18, 2020 7:31 pm Not a good idea to cut the sensor wire ! It’s a shielded wire and this should be maintained after rejoining .
Yep, I sussed it out and it's all working fine now