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I can brick a GM ECU for not pulling the radio fuse when writing a tune back or not having a charger on it.
Carry on... |
Originally Posted by Rookie
(Post 4912794)
I can brick a GM ECU for not pulling the radio fuse when writing a tune back or not having a charger on it.
Carry on... |
Originally Posted by Brad Christy
(Post 4912790)
Dan,
I just can’t see how the ECM would care where it’s getting its 12v from…. Thanks. Brad. It doesnt but if there is a spike the battery will absorb it.. interference is also issue , going straight to battery helps with that too. SB , yes . as good as a brick. |
Originally Posted by ICDEDPPL
(Post 4912853)
You`re really fighting this instruction hard ! lol
It doesnt but if there is a spike the battery will absorb it.. interference is also issue , going straight to battery helps with that too. SB , yes . as good as a brick. Nope. Not anymore. I don't have to agree with the logic to follow it out of an abundance of caution. I'm going straight to the battery and making provisions to charge both batteries simultaneously. Thanks. Brad. |
Originally Posted by Brad Christy
(Post 4912774)
Guys,
I picked up one of these, and I intend to wire it like this: https://cimg3.ibsrv.net/gimg/www.off...ba024defc0.jpg This still leaves the ECM out to dry in the event of a catastrophic ECM battery failure, but it's the best I can come up with, and no different than a single battery setup. On the right track? Thanks. Brad. |
Originally Posted by Wildman_grafix
(Post 4912874)
jsaduwffebhuvve
Covfefe...? :angry-smiley-038: Thanks. Brad. |
Originally Posted by Brad Christy
(Post 4912883)
Wildman,
Covfefe...? :angry-smiley-038: Thanks. Brad. |
Connecting directly to the battery cable wiring, you remove the potential for lower voltage feeds from poor connections (resistive) down system. Also noise as Dan mentioned. Ground wiring also important for electrical 'noise'.
The protocal is likely to ensure positive successful use and removes a factor when troubleshooting. You may have good wiring practice...others...as we've all seen, are less than desirable. |
I vote to wire straight to the battery.
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Originally Posted by Brad Christy
(Post 4912774)
Guys,
I picked up one of these, and I intend to wire it like this: https://cimg3.ibsrv.net/gimg/www.off...ba024defc0.jpg This still leaves the ECM out to dry in the event of a catastrophic ECM battery failure, but it's the best I can come up with, and no different than a single battery setup. On the right track? Thanks. Brad.
Originally Posted by Tartilla
(Post 4912908)
Connecting directly to the battery cable wiring, you remove the potential for lower voltage feeds from poor connections (resistive) down system. Also noise as Dan mentioned. Ground wiring also important for electrical 'noise'.
The protocal is likely to ensure positive successful use and removes a factor when troubleshooting. You may have good wiring practice...others...as we've all seen, are less than desirable. Yup. As you can see from the diagram, I am planning to connect straight to the battery, including the ground. I just had to figure out how to charge both batteries, regardless of which battery the switch was on. Now, if I could just find an automatic, voltage sensing switch that would instantly switch to the other battery and give me a chance to get back to the trailer should the direct-connect battery take a dump. As it is right now, if the battery the ECM is connected to takes a sh!t, I'm high and dry, and I'll NEVER hear the end of it from the CFO. Thanks. Brad. |
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