I am installing a mopar header and need to extend the oxygen sensor wires so they will reach the hook up in the wiring harness because the fitting for the sensor is not in the same place as it was for the stock exhaust system. can I just splice some wire in to extend them,or is it a special kind of wire that I need to use? what kind of connectors should I use? I know it will have to be very water proof and heat proof,as that is a bad area of th engine compartment. i have done some wiring before,but not in an area that has to be this sealed. thanks,Ben
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extending oxygen sensor wires?
- Thread starter cjben
- Start date
lawsoncl
NAXJA Forum User
- Location
- North Idaho
Shouldn't be a problem splicing. I would solder and then use heat shrink or at least the liquid electrical tape on the connections.
JEFF
NAXJA Forum User
- Location
- Hamburg Mi
Splice on the harness end and NOT the sensor end, the length and resistance of the sensor wires are integral to proper operation of the O2 sensor.
5-90
NAXJA Forum User
- Location
- Hammerspace
I'd do it the easy way - figure out how much extra wire you need, and make a jumper with a three-pole Weatherpack at each end. Plug it in between.
The HEGO on HO XJs generates a voltage at low current - as long as you use a wire gage at least the same size as OEM (18AWG, as I recall) you should be fine. But, using the Weatherpacks would simplify things immensely - you don't have to worry about splicing, they're already environmentally sealed, and you can build the thing on the workbench and just plug it in when you get down there.
The HEGO on HO XJs generates a voltage at low current - as long as you use a wire gage at least the same size as OEM (18AWG, as I recall) you should be fine. But, using the Weatherpacks would simplify things immensely - you don't have to worry about splicing, they're already environmentally sealed, and you can build the thing on the workbench and just plug it in when you get down there.
Samuryan
NAXJA Forum User
- Location
- Makawao, HI
you can get a lot of extra slack by removing the O2 sensor wires from the harness, tape it back up and run it where you need. No splicing, no extra connection. Simple is best.
5-90
NAXJA Forum User
- Location
- Hammerspace
I usually pick them up at the local parts house - anywhere that carries the HELP! line of parts should have them on hand.
SuperRA
NAXJA Forum User
- Location
- Santa Clara, CA
cjben said:
Good used connectors can be saved from old sensors such as CPS, TPS, O2. I know that the TPS plugs right into the CPS. Pins can be gotten from MAT and CTS etc. When I replace sensors, I snip off the pigtail and save the connectors.
5-90
NAXJA Forum User
- Location
- Hammerspace
SuperRA said:
So do I. Also, save the "heat sleeving" if you replace any HEGO sensors - that stuff always comes in handy sooner or later (if not for heat protection, then for protecting wires and small hoses from abrasion...)
The proper crimper for Weatherpacks is a bit spendy (typically $30 or so,) but I use WPs everywhere, and the thing lasts just about forever anyhow. I'll use a Gardner-Bender staking tool for the yellow/blue/red-sleeved lugs, it works well.
It's possible that you can run into "keyed" Weatherpacks - but it's fairly rare. I don't think I've run into one in a good fifteen years or so...
