Senior Member
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Join Date: Dec 2015
Location: Colorado
Posts: 1,181
Real Name: Ron
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Senior Member
Join Date: Dec 2015
Location: Colorado
Posts: 1,181
Real Name: Ron
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If the 4runner has the factory tow package (likely if it has the 7 wire connector installed), it has a battery charging wire in the connector. This wire is switched through a 30 amp relay and a 30 amp circuit breaker in the engine fuse/relay box, and is only connected when the ignition is ON. It works well; the trailer is isolated from the vehicle battery when the engine is stopped, and connected for charging when the engine is running.
So basically, everything you need is already in place. Just connect the charging wire to your trailer battery in the trailer harness, and you're good to go.
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2006 Sport Edition, V8, 206K miles, 2.5/1.5" OME lift, SPC adjustable UCA's, 255/75/17 BFG KO2's load range C @ 40psi. Regeared diffs to 4.30, with TrueTrac in rear.
1994 SR5, V6, 5-spd, Aussie locker front, Aisin manual hubs, Truetrac rear, 33/10.50/15 BFG KO's, stock suspension, OBA (Viair 400C), Front Range Offroad twin stick, 225K miles. Dual 2.28 transfer cases, for a 90:1 crawl ratio.
Last edited by RonJR; 08-30-2020 at 10:54 PM.
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