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Old 09-22-2019, 08:57 AM   #1
TA_C10
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Location: Texas
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Engine harness, bulkhead, power circuit protection

I'm trying to get this right the first time. I did some searching on this and this is the best diagram I could come up with. I am no wiring expert and really want to understand this.

What I have come up with is I need protection between the battery and alternator and protection between battery and bulkhead, and protection between battery and engine harness.

My info:
I have a LM7 LS swap with the original harness cut down to a standalone harness.
I will be doing a battery relocation to passenger side frame rail

So, will this work?
- Battery and Alternator = 100amp Circuit Breaker
- Battery and Bulkhead/Engine Harness = 80amp Circuit Breaker
- Battery and Engine Harness(LS) - 50amp
- Battery and Starter = FORD Solenoid (1989 mustang style)

The LS Harness is my biggest question here. Does it need to be on a separate circuit breaker or should I combine that with the 80amp going to truck bulkhead?

Here is a similar wiring diagram I found.

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