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no "mode" display, Mode button did not illuminate either. will follow up more tomorrow. Side note- the heater fan EATS power. Thimking thru all the times getting home "barely" with trans not getting enough voltage to operate (under 22v)... was when heater fan was on full blast.... like...

seems via online code manual 13 12 is love voltage.... aka- not related to over heating the other two D's not having sub codes confuse me; though 24 as primary code is about temps, and 13 is about voltages PS- engine temps are fine

recent upgrade to my home computer caused no file names to appear.... so I cant find my allison trouble shoot guide. My apologies... (searched in here too) recently.... (and this scares $hiat out of me) i am getting "trans over temp " warning light somewhere near middle to end of a half hour...