Serial Port??? Phone Line??

[93Rubie]

So, I have a non-working passenger foot well light the other day. I pull the black plastic shield down that hold the light, pull the light out, the bulb appears ok and I check for voltage to the socket, ok I got it. I put the bulb back in for grins and giggles and it lights, cool...Must have been a case of terminal fretting...happens in air bag circuits from time to time. IDK...

Now when I was down there looking through the now hanging black plastic shield I see wires, ok duh, but one catches my eye. It appears to be a phone jack??? Its black wire that looks like a phone line and has a phone jack looking end on it. I didn't trace the wire or anything but I found that strange. I looked all though my FSM's and didnt find anything on the mysterious "jack."

Anyone know what this is. My guess is that is is a seperate communication port for a module for use with a Tech 1, as back in the day before OBDII, everything was a smorgas board of diagnositc ports and such.

Any ideas/knowlegdge of this, thingy???

 

[vetteoz]

My guess is that is is a seperate communication port for a module for use with a Tech 1, as back in the day before OBDII, everything was a smorgas board of diagnositc ports and such. Any ideas/knowlegdge of this, thingy???

Not unless it is wired into the ALDL connector or the ALDL wires into ECM;
someone may not have had the correct adapter cable and tapped straight into the wires
OBDI uses the same ALDL connector setup as found on OBDII cars for communication to laptop or scanner;

 

[Itshakes]

Mysterious port

It sounds like the PO ran a wire for a radar detector. They usually get the power from the fuse box or splice into the lighter. It probably runs up to the dash, or somewhere near the visor/inside rear view mirror area.

 

[Schrade]

So, I have a non-working passenger foot well light the other day. I pull the black plastic shield down that hold the light, pull the light out, the bulb appears ok and I check for voltage to the socket, ok I got it. I put the bulb back in for grins and giggles and it lights, cool...Must have been a case of terminal fretting...happens in air bag circuits from time to time. IDK...

Now when I was down there looking through the now hanging black plastic shield I see wires, ok duh, but one catches my eye. It appears to be a phone jack??? Its black wire that looks like a phone line and has a phone jack looking end on it. I didn't trace the wire or anything but I found that strange. I looked all though my FSM's and didnt find anything on the mysterious "jack."

Anyone know what this is. My guess is that is is a seperate communication port for a module for use with a Tech 1, as back in the day before OBDII, everything was a smorgas board of diagnositc ports and such.

Any ideas/knowlegdge of this, thingy???

FSM Vol II has harness schematics in section 200 or 201, and details of each line in each harness.

Also in section 200 or 201 is diagrams of ALL harness connectors. If there's a phone jack (RJ-45 or RJ-11), it will be listed there.

 

[93Rubie]

It sounds like the PO ran a wire for a radar detector. They usually get the power from the fuse box or splice into the lighter. It probably runs up to the dash, or somewhere near the visor/inside rear view mirror area.

I bet you hit the nail on the head, your post made me remember when I was cleaning the inside of my windshield I found two circles at the base of the windshield, first thought was WTF is that?, then it dawned on me, Radar Detector, DUH. I'll trace the wire, I bet your right, and with the circles from the suction cups on the windshield, that has to be what it is.

I have never owned a radar detector so I don't know how they connect or what the connectors look like.

I have never seen a phone jack type of connector used in automotive application, and i did check my FSM, no phone jack. SO it must have been for the radar detector.

 

[Curious George]

I bet you hit the nail on the head, your post made me remember when I was cleaning the inside of my windshield I found two circles at the base of the windshield, first thought was WTF is that?, then it dawned on me, Radar Detector, DUH. I'll trace the wire, I bet your right, and with the circles from the suction cups on the windshield, that has to be what it is.

I have never owned a radar detector so I don't know how they connect or what the connectors look like.

I have never seen a phone jack type of connector used in automotive application, and i did check my FSM, no phone jack. SO it must have been for the radar detector.

It may also be from a previous amp installation. A lot of subwoofer amps that have a remote level control use a RJ-11 type connector.

CG

 

[Towu4free]

there was a vette on ebay one time i almost bought that was purple and it had a phone in it...like the caddys and such...