• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

TR5/TR250 Windshield wiper motor

David Stong

Freshman Member
Offline
Has anyone out there upgraded he windshield wiper motor from TR4/4A/250 to theTR6 unit? The wheel boxes, arms, etc. are all in good shape (I replaced them in the last rebuild), so there's no way I want to dig in under the dash again. Does the newer motor work OK in the older model, and can I just unhook the cable cam and attach it to the new unit?
 
OP
D

David Stong

Freshman Member
Offline
Thanks, Tom. The link helps. Looks as if it is commonly done, so I'm assuming it will work for me. I'll let you know.

DAVE
 

glemon

Yoda
Country flag
Offline
I had the same plan, there are differences in the wiring and the switch that have to be figured out I think the mechanical hook up is the same, you need to fabricate anappropriate and sturdy new mounting point as well, doable, but not the easy swap I was hoping for.
 

charleyf

Jedi Knight
Bronze
Country flag
Online
I have a TR6 wiper motor on my TR4. But I was not the one to make the change. I do know that you will have a problem with the electrical hook up. The newer unit has a multi port plug. Try to get both sides of that plug if possible.
 
OP
D

David Stong

Freshman Member
Offline
OK. I finally received the new motor,and I see what you mean about the difference in electrical hookups. It appears the TR6 switch has a connection to the voltage regulator, which the TR250 doesn't have. All other connections are the same, so I can just solder blade connections for them. But I would just not connect the voltage regulator, leaving one of the connections at the motor blank. Is that how yours was hooked up? Or do I need to buy a TR6 switch?
 

TRopic6

Jedi Trainee
Silver
Country flag
Offline
David,

You could use the 69-72 TR6 switch (same size) but the wiring is significantly different. Hopefully someone who has made the swap can explain how. The 'square' TR4A/250 DR3A wiper motor gets two speeds by using one or two (ie both) field windings. The TR6 'round' motor' has separate low and high speed brushes, and 'off' actually grounds out the low brush to ensure the blades park correctly. Check out Alan's great article in the Technical area.

Although the TR250 switch looks the same it is very different electrically. For whatever reason, the plastic used by Clear Hooters led to a high failure rate, although they probably didn't expect them to be in use 50 years later! Can your original motor be rebuilt?
 
Last edited:

charleyf

Jedi Knight
Bronze
Country flag
Online
My TR4 uses the regular switch. One feature that is not hooked up is the stop. So I just turn the switch on and off until I get the wipers in the bottom or off position.
 
OP
D

David Stong

Freshman Member
Offline
Thanks, TRopic6! I found Alan's article, but that appears to be related to TR4A and earlier. But it still explains a lot. My TR250 motor is a bit worn and under powered, so if I can get the new unit to function, I would prefer to use it. If not, I can rebuild it. But knowing that "theTR6 'round' motor' has separate low and high speed brushes, and 'off' actually grounds out the low brush to ensure the blades park correctly" is really helpful. RE: the switch, I've replaced it years ago with a new switch, and from what I can tell, TR6 and TR250 have the same part number. Also, years ago I installed an intermittent switch in the mix. Bottom line: I'm going to have to sit with and electrical meter and TR6 vs TR250 elec diagrams and plot it all out. Ouch. But hey, nothing better to do, right?

DAVE
 

TRopic6

Jedi Trainee
Silver
Country flag
Offline
Dave,

The TR4A and TR250 both originally had the same wiper motor (75568), but after 50 years someone may have swapped it out along the way. The TR250 wiper switch is unique and now pretty rare. Maybe you can use the plug part from the TR6 harness and wire it to a TR6 rocker switch. I bet someone has already done it and hopefully can advise of any hidden pitfalls.

Jeff
 
Similar threads
Thread starter Title Forum Replies Date
BoyRacer windshield wiper motor rubber mounting grommets Austin Healey 9
R grease for windshield wiper motor- BJ7 Austin Healey 4
P Bugeye Windshield Wiper Motor Spridgets 3
T TR2/3/3A Windshield Wiper Motor Grease Triumph 4
P windshield wiper motor Triumph 14
TraceZ how to remove windshield wiper motor. Spridgets 7
G Windshield wiper motor MG 16
KVH TR4/4A TR4 Windshield Wiper Motor Issue Triumph 8
Tinkerman Lucas windshield wiper motor DR-2 rebuild? Triumph 9
R BJ-7 windshield wiper motor wiring problems Austin Healey 3
G TR2/3/3A TR3A Windshield wiper motor...any help? Triumph 2
V Windshield Wiper Motor Jaguar 3
V Windshield wiper motor Jaguar 8
kcbugeye1275 Windshield wiper motor Spridgets 7
J windshield wiper motor Triumph 1
W Windshield / Windscreen Wiper Motor Austin Healey 1
A windshield wiper motor MG 5
Sopwith_Camel mk2 windshield wiper nozzles Jaguar 4
BoyRacer Windshield Wiper Wheelbox Austin Healey 4
B TR2/3/3A Windshield Wiper mount rubber Triumph 3
C windshield wiper stupid question Spridgets 7
B Windshield wiper arm MG 3
Roger Elan Windshield Wiper Lotus 2
I TR6 help with TR6 windshield wiper arm removal Triumph 6
B TR2/3/3A TR3 Windshield Wiper Tubing Triumph 5
NutmegCT Windshield wiper scratch removal? Restoration & Tools 14
I Windshield wiper help please. Spridgets 1
T windshield wiper mods/upgrades? Austin Healey 4
G Windshield wiper blades MG 2
A TR2/3/3A TR-3A windshield wiper assembly Triumph 2
Michael Oritt Variable Speed Windshield Wiper Austin Healey 4
Ohiobugeye Bugeye Windshield Wiper Installation OUCH !!!! Spridgets 3
C Are there spacers for the windshield wiper posts? Spridgets 3
58Custom Windshield wiper questions Spridgets 1
M Windshield Wiper Alternatives Spridgets 5
M 90 XJS Windshield Wiper Won't Shut Off Jaguar 5
T Windshield Wiper Gearbox Grease Austin Healey 2
RSMTR8 Windshield Wiper Scratch Removal? Triumph 5
X Windshield wiper problems Spridgets 3
C Windshield Wiper Upgrade - AH 3000 Austin Healey 4
K T-Series Windshield wiper path scratch removal question MG 17
P Windshield wiper drive post rubber grommets Austin Healey 1
W windshield wiper tech on 74 XJ6L Jaguar 1
M TR6 Windshield Trim TR6 Triumph 14
Michael Oritt 100 Windshield seal Austin Healey 0
S Bugeye Windshield Seal Austin Healey 1
E TR6 74 TR6 - Rear and windshield frame color Triumph 2
B Windshield glass, where to buy Restoration & Tools 4
S TR2/3/3A Cutting the finish end on the windshield top rubber Triumph 4
C MGB 1966 MGB windshield glass MG 4

Similar threads

Top