Would you want a wiper delay harness? Options

[JeffBowlsby]

My thanks to Ralph Gosnell, he let me borrow an original factory wiper interval wiper relay harness. I have since done some initial research and it looks like I could make these available, with a new relay.

I could make the harness available in the $40.-50. range, and the relay is available at cost for about $65.

The harness would come with detailed pictorial installation instructions and the wires would be correctly color coded. It would take careful scrutiny to see the difference from my harness and an authentic factory harness.

Please respond to this post if you would be interested in getting one of these harnesses. I suspect I would just provide the harness and tell you how/where to obtain the relay. Your response is not a committment to buy, I am just gauging interest to see if I should develop this idea further and order parts.

Thanks! Jeff

[JeffBowlsby]

Thanks for the great responses so far...I will hope to shed a little more light on what I have found...and maybe more confusion.

The Factory Manual calls it a 'wiper interval relay-(optional)', on both the 1972 and 1973 model year schematics. In 1974 they issued a separate 'Additional wiper interval' schematic, dated 1973. There is no similar diagram for the 75 model years and the factory manual does not cover the 1976 model year. I havent studied the schemantics in any detail to see if there are other differences, which I need to do.

I dont know how the wiper interval relay works internally Fiid...but why reinvent the wheel? Its only a paltry $65 for the real deal...

The factory manual has a diagram and instructions for the conversion, dated 1973, at page 4.4-6/1. To me that means the 74 cars would be capable of a direct swap in retrofit. It maybe possible to retrofit a new switch and wiring into an early car, but I dunno...

The relay can be had from PP or apparently anyone with access to Bosch. PN 111 955 531 is apparently the originally specified relay. It has been superceded by PN 477 955 531 according to Darren at PP. He quoted me a price of ~$57. +tax/shipping. The relay has some microelectronics in it...capacitors and a chip I think, not just a typical on-off electromagnet type relay. If I do these harnesses, I'll just do the harness and let you get your own relay....I have no interest in inventorying something you can easily get on your own.

The wiper delay/relay is not an appearacnce group item, it was simply an option...like the rear window defroster.

The harness I have seen only has four wires - Brown, Green/white, Red and Blue/Black. Andy described his install as having 5 wires, which corresponds to the 1974 'Additional wiper interval' schematic, in fact it corresponds to each of the 72-74 schematics. The additional brown/black wire comes out of the main body wiring harness and is attached to the S pole of the relay, which goes to the switch.

In either case the wiper lever arm/switch and/or the steering column housing needs to be modified (a tab removed) so that the multi-positions can be achieved.

Jeff

Edited Feb 26, 5:20 am