• 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

oh curmbs! turn signals and brake lights were...

Blackjokr

Jedi Warrior
Offline
working until today! I had two bad lightbulbs in the front side markers, the passenger side marker in the rear, the brake/tail light on the driver side.

So i bought new bulbs at pep boys. matches them and replaced them. Now the blinkers don't blink and the brake lights don't come on when you press the pedal but the tail lights are on.

Could it be possible that somehow in all of this I popped a single fuse that runs the blinkers and the brake lights?

Any other suggestions?

I did remove each new bulb one at a time and still no good.

GRR!!!!!!!!!!!!!!!!!!!!!!!!!! I wanted to take her to the car show tomorrow...dang it!

BJ
 
OP
B

Blackjokr

Jedi Warrior
Offline
ok so i did a little digging and am NOT an expert on wiring diagrams, but suspected they are on the same fuse. According to this, if I am reading it right..the wiper motor should have stopped working too which I just ran out and confirmed! and yes they all worked earlier today. So the diagram shows them on the same fuse in the fuse box, but this diagram shows only 2 fuses and I have four under my hood on the passengers side of the car inside the hood. Could I be on the wrong fuse box? is there another somewhere else? Again sorry for these silly requests, but so far this forum has helped this greenhorn fix his MG Midget and MGB. thanks in advance guys!

BJ
 
OP
B

Blackjokr

Jedi Warrior
Offline
ok, so I am going to check the wires for voltage tomorrow before and after the fuse box. if the wires are hot to the fuse box I believe that it might be fuse 3 (3rd down from top) that is the culprit because of what i have been googling. However I took it off and checked the fuse and it seems unbroken. So I guess the voltmeter will tell me for sure because all of these darn things worked right before I left to buy the new bulbs and then stopped after I put the new ones in. Coincidence??? I think not! lol...

anyone that wants to chime in with some experience tips is more than welcome!

BJ
 

DrEntropy

Great Pumpkin
Gold
Country flag
Offline
Chopstick and some green ScotchBrite, make a big Q-Tip with 'em and polish the contacts and I.D. of the bulb sockets.

The brake lights shouldn't be fused. WHAT car is this, BJ?!?!
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
Ditto what Doc said.

BUT - first things first: If the diagram you're looking at is the first one on the link you provided, it's the wrong diagram. Regardless, if your diagram shows only two fuses, it's wrong. Your car is a late model B, which has four fuses. Scroll down on the link to page 25 - for the '78 and later B. You'll notice the lights are on the two fuses with red wires; those two fuses are both fed by the red and green wire coming off the headlight switch. There's a link - the little black line you see on the diagram from the "top" fuse (on the diagram) to the one below it.

The wipers are fed by the next fuse down - green wires. Those are energized only when the ignition is on. The last fuse (purple wire) feeds things that can be turned on whether the ignition is on or off.

The best way to check fuses is with a volt/ohm meter, as a visual check doesn't always tell.

Whatever the case, take voltage readings at all locations once you've confirmed the condition of the fuses.

And remember the number one rule when troubleshooting British electricals: GROUND, GROUND, GROUND. Most often corrosion has been doing its thing and periodic maintenance is your friend. So is dielectric grease after you've polished up all the contacts. You can get that at most parts stores.

Let us know how you fare.

Mickey
 
OP
B

Blackjokr

Jedi Warrior
Offline
you guys rock! I remember one other thing: with everything off I shot a little wd-40 into the sockets to clean them. I let it dry for hours before putting the bulbs in. Now I did this on the side markers and they worked fine. Even the taillight lit up so I thought that wouldn't be the issue. I will clean those contacts and now i remember after my fuel pump incident with the ground I will check these.

DocE: Love the special tool!!! I'll be building my own today!!

Mickey, Thank you for pointing out the correct wiring diagram! I was on the wrong one!! Forgive my ignorance and bear with me a sec: The taillights work, but the brake lights don't. I think I am reading the diagram wrong, but it looks like the brake lights, the blinkers and the wiper motor all work off that same 3rd fuse and are fed with the green wires which I see do work when the ignition is ON. Again, forgive my ignorance. I am learning here! Thanks guys!
 
OP
B

Blackjokr

Jedi Warrior
Offline
what i meant to say was it looks like they ONLY work when the ignition is ON.
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
Blackjokr said:
what i meant to say was it looks like they ONLY work when the ignition is ON.

That is correct, Sir!
 
OP
B

Blackjokr

Jedi Warrior
Offline
ok cool so either i have dirty contacts, bad fuse or loose wire. I am going to buy some new fuses just in case. Wish they had something other than bus fuses! I assume someplace somewhere someone has a more modern fuse box with the plastic colored fuses somewhere?
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
Blackjokr said:
I assume someplace somewhere someone has a more modern fuse box with the plastic colored fuses somewhere?

Yep, but not cheap. And not really necessary unless you want to redo all the wiring as well. The originals, once cleaned up and maintained, work very well.

Here's the one many folks use:

Advance Auto Wire
 
OP
B

Blackjokr

Jedi Warrior
Offline
Ok I'll stick to original then. I prefer it usually. I am seriously liking the look of Some chromed engine parts or polished aluminum! Thank you for your help Mickey and everyone else too
 

DrEntropy

Great Pumpkin
Gold
Country flag
Offline
Use a test light and check the brakelight switch for proper operation, too.

I'm flyin' by memory only here, but the solid green wire should have power ~to~ the switch, the green with the tracer (ISTR it's a black one) should be "hot" when the pedal is depressed.

Brer Mick... since YOU went to the diagram, mebbe confirm or call me forgetful. :wink:
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
DrEntropy said:
Brer Mick... since YOU went to the diagram, mebbe confirm or call me forgetful. :wink:

So you're the eighth dwarf!

Getting ready to do a funeral, so I can't check now. But from memory, any circuit fed by green wires is only hot when the ignition is on. Brake lights only work with the key "on".

Check the link to the diagrams - page 25, I think.

Will be back on board later this evening.
 
OP
B

Blackjokr

Jedi Warrior
Offline
you guys are the best. I followed the wiring diagram you suggested. Found the fuse (3rd down from the top) and looked at it again. it was the thicker type, not the "string" of wire, but the actual band and it looked good..not broken and barely bent. anyway, bought some new 15A bus fuses at Pep boys, replaced that fuse and BAM! everything came to life! WOO thanks guys! I might just take her to the car show today instead of my GN!

Thanks again!

Lou
 
Similar threads
Thread starter Title Forum Replies Date
L BUG EYE WHAT CAUSES A VOLTAGE REGULATOR TO STICK ON WHEN U TURN KEY OFF Spridgets 3
T TR2/3/3A turn indicator bulbs Triumph 26
Got_All_4 TR5/TR250 Lost Turn Signals Triumph 2
C TR6 TR6 TURN SIGNAL PROBLEM Triumph 13
BoyRacer LED Turn Signals Austin Healey 5
S TR2/3/3A LED turn signal -- panel flasher not working Triumph 5
R Turn Signal Knob goes off center Austin Healey 9
E MGB Turn signal bulb MG 5
E MGB Turn signals 65 mgb MG 4
M For Sale chrome turn button fasteners Austin Healey Classifieds 1
steveg Picture needed - front turn light Austin Healey 4
Nelson Turn signal beeper. Spridgets 14
M TR2/3/3A 1960 TR3A turn signal harness Triumph 6
nichola TR6 GP3 Camshaft won't turn Triumph 8
M TR6 Turn signal switch stalk Triumph 1
W MGB Turn signals on 78 MGB MG 3
jfarris TR2/3/3A Modified turn signals/brake lights on a 56 Triumph 6
J BJ8 Phase 1 left turn signal [driver side] Austin Healey 16
K TR2/3/3A Turn signal and control head memory refresh..... Triumph 9
K TR2/3/3A Turn Signal Control Head Alignment Again Triumph 1
J 1997 Vanden Plas X300 ,Help With Turn Signal Blowing Fuses Jaguar 3
T TR2/3/3A Is it possible to buy stronger springs for turn signal lever in control head? Triumph 14
B Turn Signal Indicator Light Always Flashing Austin Healey 10
T TR2/3/3A Turn Signals Blinking too fast Triumph 2
R TR2/3/3A The Turn Signal Challenge Triumph 2
TR3TR6 TR6 TR6 turn signal puzzle Triumph 11
S Turn signal nightmare ! Spridgets 4
S Turn signal nightmare ! Austin Healey 4
Tosh TR6 Engine dies slow left turn. Triumph 26
N Turn signal flasher?? Spridgets 8
D MGA MGA turn signals MG 3
J BJ8 Turn signal help needed. Austin Healey 6
PAUL161 T-Series Turn Signal Flasher MG 8
glemon General Tech Turn Signal Issue Triumph 12
TR3TR6 TR6 Turn signal lights don't flash when under load. Triumph 5
T TR2/3/3A What causes fast flashing turn signals when all bulbs & indicator light are flashing? Triumph 15
R Turn signal switch [trafficator] Austin Healey 1
R BT7 turn signals Austin Healey 5
KVH TR4/4A Rear Turn Signals are Blinking In Reverse Triumph 2
R TR2/3/3A Turn signal wiring Triumph 1
S Bizarre turn signal issue Austin Healey 10
bighealeysource Turn signal gremlins on BN2 Austin Healey 2
R TR2/3/3A Steering Hub Turn Indicator lever Triumph 7
T TR4/4A Heater control valve - cant completely turn off Triumph 3
P TR2/3/3A TR3 turn signal and horn control wiring check Triumph 4
Martinld123 Brake Lights But No Turn Signals Austin Healey 9
bighealeysource Turn signal issues Austin Healey 6
J LED Brake / Turn Signal Austin Healey 4
77MidgetMkIV High Beam/Turn Signal switch issue? Spridgets 21
Joe Schlosser LED Turn signals Austin Healey 9

Similar threads

Top