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Taillights not working, check engine light on, codes P0700, P0705, P1694

Tiny
TEWEBB
  • MEMBER
  • 1998 JEEP CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 217 MILES
Taillight stopped working, discovered the wires coming from the taillight and plugs into the chassis, shorted out with broken wires, a couple came out when I unplugged it, rewired it, taillights are working now but no reverse lights and check engine light is on and wont shift into overdrive. I have one unknown wire that I have no idea where it goes, it appears to be brown with white striped, or maybe black with white striped. Ran the codes and came up with p0700, p0705, p1694. Any thoughts?
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Friday, March 1st, 2019 AT 10:39 AM

10 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
See the two fuses in the circle, one is for left tail lamp, the other is for right tail lamp. Not only check the fuses, use a test light, check voltage at fuse. Those fuses get voltage from headlamp switch. At the rear, black wire is ground. Need voltage and ground. I did look up a couple of those codes, don't think they have anything to do with tail lamps. The p0705 talks about transmission range sensor. The p1694 has to do with buss messages from PCM.
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Friday, March 1st, 2019 AT 11:34 AM
Tiny
TEWEBB
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  • 5 POSTS
Yes, I understand all that but those codes can be caused by the NSS switch also, I have four wires coming out of the taillight, but harness side of the plug has five wires. No idea where this brown with white tracer is going to. All of this happened at the same time.
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Friday, March 1st, 2019 AT 3:00 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Your reverse lamp does run through neutral switch. I don't see the connection with the tail lamps? I'm not talking about the whole assembly. Maybe I don't understand, if that's the case, my bad.
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Saturday, March 2nd, 2019 AT 9:48 AM
Tiny
TEWEBB
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  • 5 POSTS
Well, I have the taillights working at this point, but had to eliminate the plug from the taillight and the main harness, but I have four wires from the taillight end but five wires from the main harness end with one unexplained wire left, brown with white tracer. But after hooking up with taillight directly, I now have the cel on and not shifting into overdrive. But shifts fine otherwise.
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Saturday, March 2nd, 2019 AT 10:05 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If my database wiring diagram isn't correct? I have no way to track the wire in question. Can you track the wire? I know it's a pain. If you think replacing the neutral switch will fix it, go for it. I can't guarantee anything?
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Saturday, March 2nd, 2019 AT 12:04 PM
Tiny
TEWEBB
  • MEMBER
  • 5 POSTS
It doesn't match any of the wires to the plug in from the nss, but I did find a brown wire with white tracer on a plug that is very close to the nss plug, but this plug is larger and black with a red slide lock on it looks like part of the main wiring harnesse
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Saturday, March 2nd, 2019 AT 1:42 PM
Tiny
JDL
  • MECHANIC
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I looked a wiring diagrams for your neutral switch and diagrams for transmission, saw no brown wire with white tracer. I looked at wiring diagrams for power distribution and ground distribution, power and ground 23 diagrams, plus the others. I did not see brown wire with white tracer. Maybe they use this wiring harness on many different vehicles, some vehicles use that wire, some don't? I don't doubt what your saying, I just can't find it? Are you sure about wire color?
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Saturday, March 2nd, 2019 AT 2:44 PM
Tiny
TEWEBB
  • MEMBER
  • 5 POSTS
Yes on the wire colors, I'm just wondering if when the plug shorted out if it could have messed up the nss? They are not cheap to replace, and I don't just want to go throwing parts at it and not have it be the problem I've looked at diagrams in hanes, and found a brown and white wire but it says it goes to the tow wiring, but I have power to my trailer hook up and all that is on the driver side of vehicle, my problem is on the passenger side.
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Saturday, March 2nd, 2019 AT 4:05 PM
Tiny
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With everything hooked up properly at tail lamps. On that connector you found, engine running and headlights on, any voltage at connector. If no voltage check for ground. If that wire doesn't carry voltage or ground, then what? I understand not wanting to throw parts at it, I'm the same way.
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Sunday, March 3rd, 2019 AT 9:54 AM
Tiny
JDL
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This is for p1694 also, possible causes for p0705. Hope it helps.
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Sunday, March 3rd, 2019 AT 1:50 PM

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