Wiring scares me. Please help
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,152
Likes: 241
From: Northern VA
Wiring scares me. Please help
Ok, I am going to wire up my heated o2 and a new tach. If someone could tell me exactly which wire (color and location) to connect the following I would be MOST appreciative. I don't want to tear the dash apart if I don't have too.
o2
I've done the sensor wire
Ground goes to chassis
Where in the engine bay can I tee into a wire?
Tach
Ground goes to chassis
Power?
Light dimmer?
I wanted to go straight to the fuse box but I can't get to the back of it and when I look up under the dash, my big melon gets stuck! :crazy:
o2
I've done the sensor wire
Ground goes to chassis
Where in the engine bay can I tee into a wire?
Tach
Ground goes to chassis
Power?
Light dimmer?
I wanted to go straight to the fuse box but I can't get to the back of it and when I look up under the dash, my big melon gets stuck! :crazy:
Burning Brakes
Joined: Jun 2003
Posts: 1,229
Likes: 1
Re: Wiring scares me. Please help (jerkyboy)
I also want to do this mod this summer after I do my exhaust. A picture as to were to hook up the power wire would be great.
I know that all you really have to do is replace your stock 02 sensor, and re-hook up the original wires, then take the extra positive wire and attach it with an ignition power source.
Most people hook them up to something that isn't really important, like the windshield wiper wire, radio, something like that.
What I'm afraid of is how do you know if the fuse won't burn out because of the extra voltage needed by the O2 sensor.
I know that all you really have to do is replace your stock 02 sensor, and re-hook up the original wires, then take the extra positive wire and attach it with an ignition power source.
Most people hook them up to something that isn't really important, like the windshield wiper wire, radio, something like that.
What I'm afraid of is how do you know if the fuse won't burn out because of the extra voltage needed by the O2 sensor.
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,152
Likes: 241
From: Northern VA
Re: Wiring scares me. Please help (VictorRussell'92)
I think I will try the windshield wiper hot wire. I guess I can put an inline fuse in there which could be easily checked??? Oh man, I hate electrical stuff! :cry
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: Wiring scares me. Please help (jerkyboy)
As far as the heated O2 sensor, just pull power from anything switched by the ignition or by the engine running: Oil pressure switch, MAF relay, fuel pump relay, etc.
For the tach, you could pull power from the fusebox, radio, etc. But I'm afraid you'll have to open up the dash to get the light dimmer. FWIW you can pull the dash pad in 5 min and get to the back of the dimmer switch from the top.
For the tach, you could pull power from the fusebox, radio, etc. But I'm afraid you'll have to open up the dash to get the light dimmer. FWIW you can pull the dash pad in 5 min and get to the back of the dimmer switch from the top.
Melting Slicks
Joined: May 2001
Posts: 3,270
Likes: 26
From: Winchester VA
Cruise-In V Veteran
Re: Wiring scares me. Please help (jerkyboy)
Go down to your charcoal canister, the valve has a pink/black wire going to it. This wire gets power from a 10A fuse hot in start or run. You can tap in and run your wire straight back along the frame rail to the sensor. It is the GAGES fuse. I doubt you would hurt anything if you stepped up to a 15A to cover your o2 load. Do you still have your air pump? If not this same circuit feeds, on pink/black also, the AIR divert and AIR select vavles
As far as my tach, I cannot remember what I'm tapped into. I used a four pin wiring harness to make it removable...
RaceDay:
Day after...(I leave the baseplate in)
As far as my tach, I cannot remember what I'm tapped into. I used a four pin wiring harness to make it removable...
RaceDay:
Day after...(I leave the baseplate in)
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: Wiring scares me. Please help (jerkyboy)
I can pull the dash pad that easily? How?
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Melting Slicks
Joined: May 2001
Posts: 3,270
Likes: 26
From: Winchester VA
Cruise-In V Veteran
Re: Wiring scares me. Please help (gcrouse)
And do be careful, you will then need to lift the edge nearest you just enough to clear all the trim, I think an inch or so will do, then pull towards you. There are a few retaining clips at the firewall, pulling the dash will release them. BE CAREFUL the dash is basically foam with a thin plastic covering, squeeze, pry or lift too much and you risk cracking it.
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,152
Likes: 241
From: Northern VA
Re: Wiring scares me. Please help (Ski2Tee)
Thanks guys. I will hit it (no pun intended) tonight. Will I be able to see down in the cavity behind the breadbox too? Maybe I can replace the faulty stereo relay while I am there.
