Electronic Trans issue....

[Eric]

 Allison 731 Electronic shift.... When i air up or drive a prolonged time the trans will not respond...period.. if i cut power by cycling the main switch all is well... I can't seem to find any harness issues as currently my wire run is exposed and all looks well at the trans....any suggestions? Oh BTW my "trans Test" button does nothing!

[NeoplanAN440]

The trans Test button ,will only activate the check light,if there is a trouble code present.
no code,no light!!!  (thats how my ht748 works) should be the same atec functions.

if you have no lights and no "do not shift"light

have you tried kneeling,if it works after that???

i had trouble with the air switch for the kneeling circuit.(if the bus kneels,it will block the shifter)

second problem i had,is the small switch on top of the master switch.
its for the 12v of the atec,and mostly all other 12v circuits are wired trough it.
so the load its carrying was to high.
i had to sepparate the atec circuit on its own switch.


thats what i had with my neoplan