Rewiring a vehicle
From Crankshaft Coalition Wiki
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==Overview== | ==Overview== | ||
When completely rewiring a vehicle there are a few things that must be determined beforehand. First, one must decide if a prefabricated harness will be used, or if a custom harness will be made from scratch. In any case, the harness should be assembled into groups and cut within a reasonable distance to the right length, while leaving extra wire to account for routing. | When completely rewiring a vehicle there are a few things that must be determined beforehand. First, one must decide if a prefabricated harness will be used, or if a custom harness will be made from scratch. In any case, the harness should be assembled into groups and cut within a reasonable distance to the right length, while leaving extra wire to account for routing. | ||
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==Fuse requirements== | ==Fuse requirements== | ||
| − | + | For heavy draw accessories a [http://www.crankshaftcoalition.com/wiki/Relay_application_guide-_Bosch_relays '''relay'''] is the preferred method of wiring a circuit. Some things that can benefit from a relay: | |
| + | *Headlights | ||
| + | *Cooling fans | ||
| + | *Fuel pump | ||
| + | |||
| + | For circuits having a high draw a circuit breaker may be substituted for a large capacity fuse. | ||
;Basic fuse requirements (from [[Media:Harness inst painless.pdf|Painless wiring]]): | ;Basic fuse requirements (from [[Media:Harness inst painless.pdf|Painless wiring]]): | ||
| − | + | {| class="wikitable" | |
| − | + | |- | |
| − | + | ! Accessory !! Amp!!Accessory!!Amp | |
| − | + | |- | |
| − | + | |Headlight switch||30||Radio (constant)||10 | |
| − | + | |- | |
| − | + | |Coil||30||Wipers||15 | |
| − | + | |- | |
| − | + | |Door lock||20||Radio (switched)||10 | |
| − | + | |- | |
| − | + | |Cigarette lighter||20||Backup/cruise control||10 | |
| − | + | |- | |
| − | + | | Horn||20||Gauges||10 | |
| − | + | |- | |
| − | + | |Brake switch||20||Dome/Trunk light||10 | |
| − | + | |- | |
| − | + | |Power windows||20|| Power antenna||10 | |
| − | + | |- | |
| − | + | |Turn signals||15||Electric fan relay||5 | |
| + | |- | ||
| + | |Emergency flashers||15||AC/Heat relay||5 | ||
| + | |- | ||
| + | | Electric fuel Pump||15 | ||
| + | |} | ||
The fuse requirement and wire gauge has to take the accessory load into consideration. Using too small of a wire can let a wire burn even though the accessory load matches the fuse rating. Using too 'big' of a fuse can let a wire burn even if the wire gauge matches the load. | The fuse requirement and wire gauge has to take the accessory load into consideration. Using too small of a wire can let a wire burn even though the accessory load matches the fuse rating. Using too 'big' of a fuse can let a wire burn even if the wire gauge matches the load. | ||
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[[Category:Ignition]] | [[Category:Ignition]] | ||
[[Category:Electrical]] | [[Category:Electrical]] | ||
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