How to Make a Charge Wire for Flat Towing Vehicle with Tow Vehicle with 4-Way

Question:

I have a 2008 Smart car toad. Want to use with Patroit brake. 1. Need to know how long I can tow before battery drains to low to start the car. Was looking into trickle charge wire but I only have 4 flat wiring so I dont have the power lead like on a 6 or 7 connector from my Motorhome. 2. Any suggestions. Id like to trickle charge if possible. Can it be done from a 4 flat?

asked by: Holly

Expert Reply:

To trickle charge the battery on your vehicle you will need to use a # 37185 to convert the 4-way on your tow vehicle to a 7-way. You will need to route the purple wire of this 7-way to the positive side of your battery on your tow vehicle through a circuit breaker like part # 9510 and 10 gauge wire like part # 10-1-1.

Now for an umbilical to go from the 7-way to a 5-way you will want to use the part # HM47075. You will then need to use the part # 47515 to convert the 4-way on your toad vehicle to a 5-way. The extra pin (blue wire) will get run to the positive side of the toad vehicle positive battery post.

expert reply by: Jameson C