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Yep, this isn’t for safety, it is for unloading the batteries as it will disable the 12 and 24v circuits. For safety you need to also lift the 12V or 24V leads…

I apologize, I messed that up. To clear the codes, press both arrows to enter diagnostic mode. Then press and hold the MODE button. After 3 seconds the controller will beep once indicating the active faults have been cleared. If you continue to hold the button at about 10 seconds the...

So turning on the power and holding the up and down arrows till the controller beeps twice(10 seconds or so) doesn’t clear the codes?

I wouldn’t swap anything yet. You need to check compatibility before you do that with trans parts anyway as Alison made continual upgrades and version changes, so you need to confirm the other controller will work with this trans. There is a whole table on compatibility in the manual… The two...

There is a vampire load on the 0-12v side of these trucks, so the 11.1v(25% charged?) there doesn’t surprise me. That leaves 12.7 on the 24v side which isn’t terrible(about 90% charged). 11.6Vrunning isn’t good on the 12v side but the total you gave indicates the 12-24 side is seeing 15.5V...

Sounds like you did it just fine. Well 1312 and 1313 are low voltage codes… 2423 is sump oil temp hot 3323 is sump oil temp sensor failed high 2214 is engine speed reasonableness test so as mentioned, voltage issues will cause troubles and those first two codes indicate you have had that...

Any codes stored? Press up and down arrow at the same time to enter diagnostic mode. The display will flash D1 then two sets of numbers(write these down) also note if the mode light is lit(indicates a current fault). There are 5 code storage locations(D1-D5). Press the mode button to step...