I think mainly due to the negative terminal on the battery should never be used, as it can cause spark and lead to explosion or fire. Perhaps it's more related to older batteries than modern ones.
Yep, it'll work fine, just red first, then black, then plug it in. Battery tending and boosting are two different things.
Wait so red is first? I always thought black (negative) should be first since that is ground and won't give you current
Yes. My CTEK - 40-206 MXS 5.0 instruction said the same. But my other cars manuals said to connect negative to the body ground. First I did as the CTEK instruction(negative and positive to the battery terminal) but then I changed negative to the strut bolt. Works fine either way but I want to be on the safe side.
That is where I attached my CTEK ground. I believe if you attach there, the current flowing to the battery is picked up by the sensor on the negative battery cable and updates the current state of charge. Or I have just gotten lucky and haven't had any issues with the smart charging system. I did this based on what I read in my service manual - same as what @Postal Bob posted.So as we know you cannot use the negative terminal .
On the shock tower there is a ground connection , can that be used or does the fact that the wiring harness is directly connected to it put in the same category as the negative terminal?
I don't know. I know that other GT350 folks directly attach to the battery terminals and don't have problems either. Maybe there is no "right" way to do it!
As everyone else pointed out — the same applies for any smart charge/battery management system (BMS) Ford or any other manufacturer that isn't using an old school dumb charging system including GM. I haven't seen the message on the mustang but during my data logs after the car sitting on a maintainer for a month and going immediately for a drive — I have noticed that the car charges at almost 15V. AKA the car thinks that battery went dead even thought it's been charged.
