GearZ Community
Register Calendar Latest Topics Chat

  Author   Comment  

Junior Member
Posts: 12
Reply with quote  #1 
Been working on my projects a while now and finally getting to some wiring harnesses.

Just basically want to be sure that I have got some stuff worked out straight and I'll need to make up some sections of loom because of fitment and routing and what you might call cable dressing.

Starting at the front of the vehicle we have two 9004 and two 9005 lamps which used to be 4651/4656 rectangular lamps each side. Next we have two small fog lights near lower spoiler under bumper. We also have two turn signal lamps, L&R. Also two cornering/sidemarker/parking lamps which function based on switch selection.

High beam low beam operate through a 20-40A fuse, two Bosch relays, the 12v battery, dimmer switch, a blue dash jeweled indicator lamp. And a momentary for dimming @ passing using a floor mounted button toggle. Wiring seems to be 10-20ga throughout. Foglight uses one relay and another 20A fuse. Turn signals operate through column switch and a relay. Hazards do as well but use s separate switch with indicator. Add in connection to battery, starter, alternator and regulator through fuse block and terminals.

We also have a Bosch ECU/ECM/PCM and several others related with their own routing.

Brake light with 3rd high mount LED stop lamp, reverse lights, rear side marker, two license lamps, trunk lamps, all are semi independent of each other.

Radio&audio system have its own harness connecting to 4 speakers, amplifier, CD changer, power antenna and XM device.

Heated seats, power mirrors, courtesy and map lighting, 12v DC jack, hood lamp, door and window switches HVAC system with motors/blowers and switches all travel under carpet and pads and pass through firewall. Provisions also for a external nav system and communication system also there too not just hacked in afterthought.

So in working, issues have been trying to keep things neat and tidy yet serviceable later on. But also trying to follow somewhat standard systems in making sure things get connected proper.

Any ideas or tips you have? I'm interested in learning more about this. So far most of it works but still have minor issues.

Posts: 93
Reply with quote  #2 


Electrical systems can be a pain.  Especially in an older vehicle.  Sometimes, just replacing a wiring harness (or loom), can make things much better.  SOMETIMES, it will just 'move' the problem area from the harness to the pieces HOOKED TO the harness.

But it's one step forward, two steps back.  And while it seems you will NEVER finish a wiring project, take plenty of breaks and think about every step before you do anything.  You CAN do this, just take your time and breathe in and breathe out.

Take some pictures and let us see where you are and what you need help with.  Remember, slow is steady.  Check everything three times.

Previous Topic | Next Topic

Quick Navigation:

Easily create a Forum Website with Website Toolbox.