rfcr Posted July 22, 2014 Report Share Posted July 22, 2014 Hello All, I have started to rewire my 46 P-15 and just was wanted to know what size wire should I use, 16, 14, or 12 gage. I checked the Tech section and could not find what I'm looking and searched the web but the $800 plus for a wiring harness is to much. I plan to take one wire at a time and replace it with a new wire then buy the rapping. I am starting with the gas sending unit, then the rear, signal and brake lights, so if someone can answer the size of wire for these areas first it would be great. Thanks. Quote Link to comment Share on other sites More sharing options...
Young Ed Posted July 22, 2014 Report Share Posted July 22, 2014 I used the 49 ply wire diagram to get sizes. Anything 16 got upgraded to 14. Quote Link to comment Share on other sites More sharing options...
rfcr Posted July 22, 2014 Author Report Share Posted July 22, 2014 Young Ed, I checked my anual for a 12 volt system but they all (P-15 thru P-20) show 6 volt. Will the 14 gage wire work on a 12 volt system? Quote Link to comment Share on other sites More sharing options...
rfcr Posted July 22, 2014 Author Report Share Posted July 22, 2014 Young Ed, I meant to type manual. Quote Link to comment Share on other sites More sharing options...
Young Ed Posted July 22, 2014 Report Share Posted July 22, 2014 Young Ed, I checked my anual for a 12 volt system but they all (P-15 thru P-20) show 6 volt. Will the 14 gage wire work on a 12 volt system? Yes wire for 6v you can use 6 or 12. You won't find a specific list for a p15 that shows 12v wiring. Quote Link to comment Share on other sites More sharing options...
_shel_ny Posted July 22, 2014 Report Share Posted July 22, 2014 http://p15-d24.com/topic/35366-wire-gauge-help/?hl=%2Bwire+%2Bgauge http://p15-d24.com/topic/35366-wire-gauge-help/?hl=%2Bwire+%2Bgauge http://p15-d24.com/topic/32814-wiring-harness-14-vs-16-guage/?hl=%2Bwire+%2Bgauge http://p15-d24.com/topic/34581-rewireing-49-dodge-pickup/?hl=%2Bwire+%2Bgauge#entry349613 Quote Link to comment Share on other sites More sharing options...
Solution rfcr Posted July 22, 2014 Author Solution Report Share Posted July 22, 2014 Okay, Thanks for all your help. I'll use 14,12 and 10 depending on the connections, components as shown in the diagram. Quote Link to comment Share on other sites More sharing options...
scotty t Posted July 22, 2014 Report Share Posted July 22, 2014 i might be a lot easier with a pre made harness, these are very affordable and have a good reputation. http://rebelwire.com/rebel-wire-products.php?cat=Wire%20Kits Quote Link to comment Share on other sites More sharing options...
DJ194950 Posted July 22, 2014 Report Share Posted July 22, 2014 Man if your 12 volt on this car I'd definitely look at a harness with fuses for whatever your may add to your car. Rebel looked reasonably priced. Even if staying 6 volt and not worried about the wire not being cloth coated I'd definitely look at the Rebel 6 volt kit. Why- way easier in the long run, more fuses to protect devices as stock only has 1 or 2. + big + they use different colors for each wire and they are labeled for Future repairs if needed! It's very hard to buy many different colors of wire where I live ( No. CA.) plus connectors that usually are in the kits (check). Lastly the wires are pretty straight v.s. rolled wire bought at the parts store. The only possible area of concern is if you keep 6 volt horns and run them on 12v. you will probably need a relay added with heavy wire from the relay to the horns. Your choice, DJ Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted July 22, 2014 Report Share Posted July 22, 2014 The Rebel harness comes with a good set of instructions, and a good fuse panel with lots of long wire. Quote Link to comment Share on other sites More sharing options...
pflaming Posted July 23, 2014 Report Share Posted July 23, 2014 When I wired my truck I built a harness first. Took me forever to debug it. Now I do it differently. I connect the guages and switches in the dash, can do that on a bench, then I run all the wires that go to the engine compartment to an eight bolt connector bar. Those wires are carefully labeled. Then I run wires out from the bar to the front lights, the rear lights, etc. I enjoy the work so that makes it easy for me to do. This wiring is on pre '55 models. I do go 12 volt. If I need a wire for some add on, I just run a wire from the Ig switch to the 'bar' and I'm good to go. Lots of ways to do things. Quote Link to comment Share on other sites More sharing options...
steveplym Posted July 23, 2014 Report Share Posted July 23, 2014 (edited) Kwikwire is another good source. I have a harness from them in my dodge. Wires are labeled what they are for. I rewired my Plymouth as original, and added a small fuse block to run my additional accessories, such as wipers, stereo, and cigarette lighter. Haven't had any problems, and did as Ed did, used the wire gauge off of the '49 diagram. Edited July 23, 2014 by steveplym Quote Link to comment Share on other sites More sharing options...
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