The wipers on my car suffered the usual, the rain cover has flaked apart and the motor was a solid chunk of rust. I looked around the internet and the cheapest rebuilt motor I found was $225 US, and they just went up from there for new or used. This did not settle well with my thrifty nature.
My Haynes manual describes the motor as a Lucas 16 watt, 2 speed motor. So, I sez to myself, how many different 16W, 2 speed motors do you suppose Lucas made. I am betting not too many. So, armed with a cheap nature, and confident that Lucas was almost as cheap as me, I shopped eBay and found a used TR7 wiper motor, Lucas 16 watt, 2 speed. Lucas # 75721. $50 delivered to my door. The shape of things to come. I had the seller measure the motor can, and his measurements were slightly different than mine. I almost didn't buy it. I don't know if I was inspired by God, or just stubborn and stupid, but I bought it. When I took the motor out of the package and compared it to my wipers it was clear that the can was the same, and the armature appeared to match too. Yee-Ha, this is going to work. The brush board was slightly different but the brushes were in the same orientation in the motor housing. So I charged forward, cleaned up my gear housing, cable and wheelboxes, and installing the new brush board, armature and motor can.
Here I hit an obstacle. The TR7 armature is slightly shorter than the original armature. I did not have enough thread on my thrust screw to adjust it. Crap! But I was not going to stop here, what alternative did I have? So after searching my garage for a 1/4-28 fine thread screw that was long enough, I finally stole one of the bolts that hold the wiper motor/cowl inlet to the body of the car. Just the right length! I adjusted armature end play, and connected the motor wires to battery, and, Praise the Lord, I have high speed and low speed! I now solder the wires from the brushes to my original wiring going to the park switch, and I fabricate a rain cover for the motor from a 5 quart motor oil bottle. I plug it into the car, Lo and behold, I have wipers! However, they do not park. Not sure why, the park switch is original, I am reasonably certain when I reinstalled the cable to the motor I did engage the plastic slide that operates the park switch. But, you know what? I really do not care!
I have gone from a rusted solid mess, to working wipers for only 50 bucks US, and an afternoons work.
Now I have a question. Which side of the car should the wipers park on? If I park them on the right, they do not wipe the left side, stop about in the middle of the driver. If I park them on the left side, the wiper arms are not angled properly, and they stick up.