S and I installed a mirror on my towncar that has a different connection . My old mirror had two connectors the new mirror only has one connector

I would plug in the one connector if it fits and see if the mirror works. The second connector that you have may be for a heater or if there is a turning arrow in the old mirror. You do 't have to install it completely. Just plug it in and ground it.

you would have to compare the connectors to see if the are the same.
Your new one will be missing some wires for the heater.
If completely different then get the one you need.
Take mirror with for new connector so you get the right one.

Power Dr Mirrors Diagnosis & Testing

Removal & Installation
Motor

1. Before servicing the vehicle, refer to the Precautions Section.
2. Remove or disconnect the following:
   
   Disconnect the negative battery cable. The mirror inside cover trim The door panel The electrical connector to mirror motor The nut attaching mirror assembly to door frame The outside rear view mirror
   
   

   Fig. Removing cover trim and nut
   Removing cover trim and nut
   
   

   Fig. Removing mirrored glass from assembly
   Removing mirrored glass from assembly
   

3. Remove the mirror glass:
   1. Fold the mirror glass forwards and inwards as illustrated.
   2. Grasp and pull the mirror glass lengthways until it releases.
   3. Work the glass out.
   
   
4. Remove electric motor:
   1. Remove the 3 screws from behind the mirrored glass.
   2. Separate the connectors
      NOTE Remember the positions of the connectors.
      
   3. Remove the mirror motor.
      
      

      Fig. Removing connectors and screws holding mirror motor
      Removing connectors and screws holding mirror motor

   
   

To install:

1. Install or connect the following:
   
   The electric motor The electrical connections The 3 screws that go behind the mirror Install the terminal pins Fold out the mirror mounting on the motor Hook the mirror glass into the inner mounting Press the mirror glass into place. Place mirror in position in door
   
   

   Fig. Reattaching mirror and electric motor connectors
   Reattaching mirror and electric motor connectors
   

2. Install or connect the following:
   
   The nut attaching mirror assembly to door frame The connector The door panel The mirror inside cover trim The negative battery cable
   

You have to examine and compare the two doors. I am just guessing but I would bet that it is the power mirror that your new door is lacking.

Just follow the wiring into each door.

1. Power locks wires should run to a region near the latch mechanism.
2. Power Windows wires should run to somewhere in the middle of the door.
3. Power mirror should run almost straight up towards the mirror assembly.

If it is the power mirror assembly you should be able to transplant your old one provided that it is not damaged.

If it is power windows, adapting power windows will be much harder as the new door may or may not have the provisions for mounting the regulator, etc.

If it is power locks you may need to transplant the latch and actuator assembly along with its wiring.

I "solved" this by simply plugging the two wires to the two connectors, since the two connectors are only for the mirror heating I have simply assumed that it makes no difference which wire goes to which connector as the connectors aren't marked in any way.

When connecting a heating element it usually doesn't matter how it's connected so I simply decided to take my chances and so far there's no problem.

It sounds like you bought the wrong year mirrors. Yes you could cut the connector off you old mirror but you would have to know the wiring for the mirror not the truck.

Its "doable" but I wouldn't advise you to do it that way. Get a phillips screwdriver to unscrew the elbow pad & any other screws holding the door panel on. Disconnect the pwr window switches & any other switches on the panel. On the lower end of the door panel there are plastic clips holding the panel to the door. POP them out of the door & remove the panel. disconnect the mirror electrical connector & disconnect the mirror body itself. Install the new one & don't forget to connect all of the electrical connectors & reinstall the panel. Good luck

the mirror u bought is wrong for sure. some side view mirror are HEATED that's why the prong/plug is different.

Exterior Mirror Removal

1. Detach the trim panel
   1. Release the clip.
   1. Detach the locating tangs.

Remove the trim panel.

• Disconnect the mirror control switch electrical connector.

1. Disconnect the mirror electrical connector.
2. Release the clip.
3. Detach the electrical connector.
4. Disconnect the electrical connector.

Just try matching from the outside to the outside, middle to middle, etc. or use a continuity tester against each pair until the light up. Solder the wires, do not use wire nuts.