• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

TR6 Ignition Switch-73TR6

WJKB-TR6

Freshman Member
Offline
The original fell apart with age and am using a replacement that does not have the same number of posts. Original switch is not of the pigtail type. I made a sketch of the original (attached) and am also including a sketch of the replacement. Comparing the two, do I have the wires correctly placed on the replacement switch? Engine starts and car runs on test drives; however, there is a drain on the battery amperage. I can not find a switch that matches the original.
 

Attachments

  • Original Ignition Switch_Sketch_2.jpg
    Original Ignition Switch_Sketch_2.jpg
    67.2 KB · Views: 94
  • Replacement Ignition Switch_Sketch_2.jpg
    Replacement Ignition Switch_Sketch_2.jpg
    45.1 KB · Views: 88

TR3driver

Great Pumpkin - R.I.P
Offline
My suggestion is to use an ohmmeter or continuity checker to record the logic of the switch you have. Lucas made an awful lot of different switches, some of which look identical (but aren't). So just counting the number of pins doesn't necessarily identify what you have. There is also a non-zero chance of a new part being defective.

I don't think you want a brown wire on #5; instead you will probably need to insulate the second brown wire and leave it unused. But I could be mistaken. The earlier TR6 ignition switch shown in the manual has terminals 1,2,3,5 rather than 1,2,4,5.
 

TRopic6

Jedi Warrior
Country flag
Offline
Aloha WJKB. In 73 they added an 'anti-run-on' valve that got power when the IGN switch was in the OFF position and grounded when the oil pressure switch had pressure (typically for a few seconds until it bled off). I don't think your early-type switch has that connection, but if brown wire for the ARO valve got connected to the main brown terminal there could be a problem. Can you send a picture of the wiring at the back of the switch?

The anti-run-on valve is under the charcoal canister on the right side of the radiator. If its been on for a while it will be warm. If it is there, pull the wires off to disable and see it that helps.

Good luck - I left Hawaii (Hickam) in 2017 after retirement. Hope H1 traffic is better now with no visitors.

Jeff
 
Last edited:
OP
WJKB-TR6

WJKB-TR6

Freshman Member
Offline
Thanks Randall and Jeff for your responses. Really appreciated!! I have modified the wire connections and connected BRN/Red to #5 as shown on the attached photos; however, not verified logic of the switch yet. The BRN/Red controls the ARO; not sure if it will work with this switch. I have not tried start up with the switch in this configuration at this time. I have installed a cut-off switch to protect the battery while sitting idle. I will inform you on its performance after first test.

Yes Jeff, things have changed since pandemic sanctions and "stay at home quarantines), extended to May 31. All visitors arriving have a mandatory 14 day quarantine to their lodging address. Government rules and enforcement very strict here. We just went thru Phase 1 relief Saturday, where populace may use parks and beaches for exercise only, no congregating. It's strange here in Hawaii seeing local people wearing masks and especially no hugging! Take care, Aloha and Mahalo! Willy
 

Attachments

  • Replacement Ignition Switch.jpg
    Replacement Ignition Switch.jpg
    24.1 KB · Views: 87
  • Ignition Switch Replacement (Modified)1.jpg
    Ignition Switch Replacement (Modified)1.jpg
    49.7 KB · Views: 85
  • Ignition Switch Replacement (Modified)2.jpg
    Ignition Switch Replacement (Modified)2.jpg
    48.3 KB · Views: 86
  • Replacement Switch Sketch (Modified).pdf
    156.7 KB · Views: 96

TR3driver

Great Pumpkin - R.I.P
Offline
Again, I'm almost certain that switch won't have the appropriate contact for the ARV (hot only when the ignition is off). You can either live without it, or add a relay to make it work.

If you leave it disconnected and it wants to run-on, learn to kill it with the clutch.
 
OP
WJKB-TR6

WJKB-TR6

Freshman Member
Offline
Again, I'm almost certain that switch won't have the appropriate contact for the ARV (hot only when the ignition is off). You can either live without it, or add a relay to make it work.

If you leave it disconnected and it wants to run-on, learn to kill it with the clutch.



Thanks again for your input. I will leave Brown/Red off and remove Brown (Thin) from main Brown (Heavy) terminal. This goes in line with Jeff, I believe. Will give it a try and also do logic. Mahalo (Thank You!)
 
Similar threads
Thread starter Title Forum Replies Date
R Bugeye ignition switch Spridgets 2
R Wanted Bugeye ignition switch Spridgets Classified 2
M Which wires fit which terminals on my Rover V8 ignition switch? Rover / Land Rover 6
R Electrical Experts - Vixen 2500 - Ignition Switch Observation? TVR 10
SherpaPilot TR6 Ignition Switch Question Triumph 13
P TR2/3/3A ignition switch smoking Triumph 12
C TR6 Ignition Switch for 1972 TR6 Triumph 1
J TR2/3/3A Early Lucas Ignition Switch Triumph 4
jlaird MGB ignition switch MG 2
H MGB 1980 mgb no power from ignition switch MG 23
old sub sailor Ignition switch / steering lock replacement in a '78 midget Spridgets 5
longbridgehealey Bugeye ignition switch Spridgets 4
G Inertia Cut-Off Switch - E-Fuel Pump to Ignition [Key] Switch Austin Healey 3
S 58 Bugeye Ignition/Light Switch Spridgets 1
S 58 Bugeye Ignition/Light Switch FORUM Navigation Questions 4
S BJ8 Ignition Switch - Lucas Part Number? Austin Healey 4
L TR6 1974 Tr6 ignition switch Triumph 3
TRMark T-Series Lever ignition light switch / pull starter switch MG 8
S TR2/3/3A those 3 white wires onto the ignition switch Triumph 3
A bugeye ignition switch Spridgets 2
A Bugeye ignition switch Austin Healey 3
K TR2/3/3A Starter,Solenoid, Ignition Switch Issue? Triumph 5
S TR4/4A Ignition switch key position Triumph 2
J ignition switch, On but no starter at all times British Motor Corp 2
C Mounting ignition switch to XKE series 2 steering column? Jaguar 4
Crankshaft TR2/3/3A Intermittent ignition switch problem Triumph 9
S BJ8 Ignition switch? Austin Healey 7
AngliaGT Ignition switch/Wiring Diagrahm..... Spridgets 0
AngliaGT Midget MKIII Ignition Switch Spridgets 0
J Fan Type Noise on Ignition Switch in Accessory Austin Healey 9
rjc157 ignition switch Austin Healey 5
RedTR3 TR2/3/3A Ignition Switch Triumph 4
Gliderman8 TR6 Installing new ignition switch Triumph 7
RickB I was wrong. Again. Not ignition switch! Spridgets 16
longbridgehealey New Bugeye ignition switch question Spridgets 10
longbridgehealey Bugeye ignition and light switch Spridgets 9
Rut Bugeye light-ignition switch Spridgets 6
H Ignition Switch Bypass Help - '61 Bugeye Austin Healey 6
G T-Series Ignition switch MG 10
B ignition switch Spridgets 5
M TR4/4A TR4A Ignition Switch Circuit Triumph 3
G T-Series Tachometer and ignition switch MG 16
T Ignition switch Triumph 6
D T-Series Access to ignition switch '68 MGB MG 9
BugeyeNJ58 Need new ignition switch..Suggestions? Spridgets 3
V Removing ignition switch assembly. Spridgets 2
BugeyeNJ58 Ignition Switch and key Cylinder comes apart! Spridgets 0
72_TR6_Oceanside Ignition switch wiring order help Triumph 16
O TR6 1971 TR6 Ignition Switch Swap Triumph 1
TulsaFred Bugeye ignition combination switch Spridgets 11

Similar threads

Top