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| I see the previous owner had added length to that harness also, I tested that out and it had good conductivity. Since it kept saying shorted I went through the wiring harness that led to the DEF relays located under the coolant reservoir , there were 3 relays with 2 light on each. When you initially turn on the engine they should all light up temporarily, I noticed one relay only had 1 light come on. 200$ later and a new relay installed ..no more multiple intermittent DEF codes ( 3363 and 4356 ). Thanks!
Edited by Northdakota1324 4/21/2021 09:05
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 20210420_153649 (full).jpg (70KB - 75 downloads)
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Looking at a cat challenger mt765d, what to inspect?
