• 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

H4 Bulb Wiring

hondo402000

Darth Vader
Offline
When I put my car back together after the paint job, the head lights were dim on low, I thought I had a bad ground but doing some investigating, I think I have the ground on the wrong terminal, I found a wiring diagram for the H4 bulbs
so FWIW looking at the connectors, if the diagram doesnt post correctly top terminal is low
left terminal is ground right terminal is high beam
.. low
.... _
gr | | high

so I will check when I get home

might have been wired wrong since I installed them

oops

Hondo
 

DNK

Great Pumpkin
Country flag
Offline
Hondo, did you remove the wiring out of the connector, because the wiring is the same
 
OP
hondo402000

hondo402000

Darth Vader
Offline
Yes I did, I put new connectors on with new heaver gauge wiring and relays
and for some reason I always thought the center post was the ground

Hondo
 

DNK

Great Pumpkin
Country flag
Offline
No it's not
a_GTBULB2.jpg
 

DNK

Great Pumpkin
Country flag
Offline
It's been a while and instead of trapesin down the stair,again, I thought I'd be lazy and look it up. Hope this is correct
 
OP
hondo402000

hondo402000

Darth Vader
Offline
hey don yes the center post is not the ground, but good to know your wiring backs up my wiring I had the ground on the wrong terminal


good to go now

Hondo
 

DNK

Great Pumpkin
Country flag
Offline
That ain't my wiring as I said . To lazy to go look so I just stole it off the webb
 
OP
hondo402000

hondo402000

Darth Vader
Offline
sorry don I need my glasses, well I found a drawing of the same seems I had the ground on the High beam side but its all good now

hondo
 
Similar threads
Thread starter Title Forum Replies Date
Michael Oritt LED bulb/resistor wiring question Austin Healey 24
jfarris TR2/3/3A Light show in the turn signal indicator bulb Triumph 2
SherpaPilot TR6 Unidentified Bulb Triumph 7
E MGB Turn signal bulb MG 5
K TR4/4A TR4 Fuel Gauge'"light bulb socket" type? Triumph 11
Michael Oritt Bulb holder issue Austin Healey 5
AUSMHLY E10 Light bulb, 2.2w vs 5w vs warm white LED Austin Healey 4
NutmegCT Lucas 432 bulb Restoration & Tools 6
R water temp bulb loose Austin Healey 27
T TR2/3/3A rear license plate bulb number Triumph 4
K TR2/3/3A Headlght warning bulb? Triumph 1
trrdster2000 General TR Rear bulb holders. Triumph 4
N Correct Bulb Holder for BT7 fuel gauge ? Austin Healey 4
N Bulb holder Mk1 3000 Austin Healey 5
CJD TR2/3/3A Headlight bulb rating Triumph 18
K TR2/3/3A Dash panel light bulb colour options? Triumph 5
S BT7 Dash Gauge Light Bulb Replacement Help Needed Austin Healey 16
Nelson Instrument bulb replacements Spridgets 14
S Wedge 1980 TR8 BULB Triumph 3
H TR4/4A License Plate Bulb Holder On TR4 Triumph 6
I Light bulb base resource? Triumph 1
Russ Austin Temperature gauge bulb stuck in thermost houseing! Triumph 10
hondo402000 New Old Bulb Holders Triumph 7
AUSMHLY 2.2 watt E10 gauge bulb Austin Healey 13
1 Bulb Holder Spridgets 2
M 1275 need to install water temp bulb. Spridgets 6
theleisure Front Turn Signal Bulb Spridgets 6
jvandyke bulb holders? Spridgets 4
jvandyke Gauge bulb holder; can it Spridgets 2
pjsmetana Spitfire Spitfire Taillights - Bulb Housing Corrosion! Triumph 8
C turn signal bulb type thing Spridgets 4
W Bulb holders ... does it matter ... Spridgets 2
R bulb wattage-BJ7 Austin Healey 8
Gearhead turn indicator bulb for a 74 Midget Spridgets 3
bobmga62 MGA dim bulb on MGA MG 6
George Zeck Turn Signal Light Bulb & Connection ..... Spridgets 1
C Looking for replacement turn signal indicator bulb Spridgets 1
C Replace tail light bulb Austin Healey 33
B Dash Bulb Replacement Spridgets 2
AUSMHLY Need the bulb number for the front and rear lights Austin Healey 2
AUSMHLY A brighter instrument gauge light bulb Austin Healey 59
RedTR3 Bulb Question Triumph 5
Jim_Gruber Need Light Bulb Socket / Turn Signal / Behind Dash Spridgets 1
jjbunn Bulb Removal Problem MG 12
S Temperature bulb removal Austin Healey 2
C taillight bulb MG 7
NutmegCT warning bulb questions Triumph 9
Brosky Brighter dash light bulb saga continues Triumph 17
davidk Fuel Gauge Bulb Holder Needed Triumph 7
T xk8 bulb failure message - help! Jaguar 5

Similar threads

Top