TR4/4A Anyone have a lead on a wiper switch for a TR4A?

[jessebogan]

Like I said... Anybody have a lead on a wiper switch for a TR4A? I have tried all the usuals, and no dice. The lucas number is 35521. Any help gratefully accepted.

 

[TR3driver]

I forget Jesse, is that a single-speed or two-speed wiper ?

 

[jessebogan]

The 4A is a two speed unit. I have several NOS or gently used single speed switches. The 2 speed is like hens teeth.I am doing this car for a customer, so I would like it to be correct. When it came in , it had a household lamp switch in it, and that just will not do. Some one else took the interior apart(with explosives from the look of it), and several parts are missing. I also need the "back" of the grab handle that is molded into the RH lower dash cover. What a mess!

 

[Geo Hahn]

Isn't it the same switch as the headlamp switch used on TR4s (and many other applications)? If so, one of those would likely be more plentiful.

 

[TR3driver]

It's not the same switch; there are several Lucas switches that look nearly identical but are different inside and/or have different terminals.

However, I believe the TR6 heater blower switch (which may be the same as the TR4 headlight switch) can be made to work correctly and looks almost identical.

The information I have handy shows three wires to the switch : black (ground), red/light green (low speed), and brown/light green (high speed). Connect the black wire(ground) to terminal 4; R/LG to 7 and N/LG to 8.

That will give low speed as the first position out and high as fully out; which I'm not sure is correct. Maybe someone else knows ?

 

[Geo Hahn]

Moss lists the same P/N for the TR4 headlamps & the TR4A wiper... but that may well be just a consolidation of parts (sometime in the past as both are NLA now).

Goodness knows there are a lot of lugs on the back of the headlamp switch with (I think) at least one combination unused and I would think if it can handle the draw of headlamps w/o a relay it would be stout enough for wipers.

I should add, it is just barely able to handle the headlamp draw.

 

[TR4]

Could another 2 speed switch be made to accept the proper knob? Maybe something like this one as posted on ebay?

https://cgi.ebay.com/ebaymotors/1968-CHEV...1QQcmdZViewItem

 

[Driven76]

Not sure if this is the one you're looking for, but I saw this on ebay today...

TR4A wiper switch

Looks like he's had one offer.

 

[TR3driver]

Could another 2 speed switch be made to accept the proper knob?

Maybe, but probably not. The TR4A switch has an unusual connection pattern, with two terminals connected for low speed and all 3 connected for high speed. Most American switches (and the TR6 according to Dan Masters) work differently.