Manually running the DEF pump

**rmxmitch** · 09-25-2017

Hello All,

As of yesterday, I have deleted my 2015 Aisin 3500, and is has done nothing short of completely changing this truck.

I am wanting to completely empty and flush my DEF system and have searched quite a bit for the best method.

I am wondering if anyone has manually triggered the DEF pump, perhaps by jumpering a relay or something similar.

This seems to be the the best method to completely empty the tank, in addition to being able to flush something through it as well.

Is anyone familiar enough with the wiring on these trucks to point me in the right direction?

Thanks in advance.

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