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MG MGB Technical - 2 Speed Wiper Motor in a 66

Has anyone installed a 2 speed wiper motor in a 66 and how did you wire it and what kind of bracket did you fabricate. Pictures?

I have a later motor and I was toying with the idea.

BTW, damn all those early brackets as I have yet to see one that isn't cracked. If I reinstall the original motor I plan to cut 2 aluminum 1/16" sheets to sandwich to the original bracket where the motor mounts are and glue it using JB Weld.
Mike MaGee

Mike,

Haven't a clue but I'm interested in your findings. Would make for a nice, tasteful modification. Would suppose you'd need a two position lucas switch much like the toggle headlight switch on the earliest cars. After that, I'd think the wireing would be fairly straightforward. Will the new motor fit your early wiper gear rack and bracket? Yes, my 64 bracket is cracked. Good luck with it.

Paul
Paul Hanley

I have the same question. I was looking in the reprint of the factory manual and it shows a 2 speed wiper in the later year steel dash cars 66-67. Im not sure if 2 speed was available in the US. Then I looked in the Moss catalog and they have 2 different types of wiper switches. One listed for roadstar and one listed for GT. The roadater is $30 and the GT is $40 so I hope the GT is a 2 position switch. I plan on calling Moss on Monday to see what the difference is and if the GT is actually a 2 position.

Cris
Cris DeYoung

There were two different kinds of 2-speed wiper with very different wiring and switches. I think the early 2-speed was only used in roadsters towards the end of the 64-67 period, after that and in all GTs the later system was used. The difference relates to the parking system and the two cannot be mixed. There are only two wires between switch and motor for the early system, plus a ground to the switch and 12v to the motor. The later system has three wires between switch and motor, plus 12v to the switch and the motor, and a ground to the motor. The different wiring diagrams can be seen at http://www.mgb-stuff.org.uk/wn_electricsframe.htm and click on 'Schematics' and 'Wipers'.

The early motor may well be the same physical type as the single-speed so no problems in mounting.

For both types your switch and wiring *must* be such that power is disconnected from the low-speed winding when switching to the higher speed, and vice-versa. If you use an early lighting switch and the same spades as the lighting wiring you will be connecting power to both windings at the same time which may damage the motor. In the second position of the lighting switch - headlights - power is still supplied to the parking lights which come on in the first position. However these switches have should have several unused spades and it is possible to use them for *either* two-speed motor by using the correct combination of spades to make and break the running and parking (later motor only) circuits.
Paul Hunt

This thread was discussed on 05/04/2004

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