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Old 09-12-2016, 05:23 PM   #3
izzy_Britton
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Join Date: Apr 2013
Location: Nor-Cal
Posts: 632
Re: What is it for? Firewall relay/solenoid

Could be dual battery isolator solenoid thing. I have one similar on my 86. Previous owner installed extra battery in bed of truck for over cab camper.

Similar to started solenoid but different.
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