My daughter and I replaced the tailgate wiring harnesses on both sides of her new 1990 245 yesterday. She decided to buy the harnesses from IPD to save some money over the price of the genuine Volvo harnesses. Here are our opinions of the job and the product in case this info might help someone.

Our conclusions about the job: The job is pretty straight forward if you have either good weather or a garage. It's nice to have a dry warm place to work with room to put the door on padded sawhorses so you can work comfortably. We found that lubing the thick part of the harness with spray silicone helps when you pull it through the narrow parts of the door.

Our conclusions about the harness quality: Low. The harness came in a Scan Tech package. The wires are noticeably lighter gauge than the original harness. The total amount of copper in the wire cross-section looks like the difference between 16 gauge and 18 gauge. This was disappointing. Also, a closer at a sample of a Volvo wire compared to a ScanTech wire revealed that the original Volvo wire consists of five separate smaller "packages" of very fine wires bundled together into one wire. It's like five wires bundled together, with each of the five wires made of tons of very small strands of copper. In other words, the original wiring contains more copper and is made of many more and much finer strands of wire bundled together. I believe this is exactly what the application calls for because of all the bending that goes on in the hinges. Also, two of the female connectors on the new harness lacked the little barbs that need to be bent up to hold them in the plastic plugs they go in. I needed to replace these two connectors. Next time I'm buying from Volvo.

This is what we learned. Hope this helps someone out there.