Resistors for LED indicator bulbs
- Thread starter Earl
- Start date
My resistors finally arrived after being on back order. They were much larger than I expected but I managed to house them on the inside edge of the rear light clusters and they have indeed solved my hyperflash. Thanks for your help with this @Robert
No, that is incorrect.
10 = 21/16/5 W - total of 42 W is your indicator wattage setup.
Bits are always counted in each Byte from right to left starting with "zero" and ending with "seven".
I've done my calculations:
P = U x I ---> I = P / U = 27W / 14.5V = 1.8620A ===> R = U / I = 14.5V / 1.8620A = 7.78Ω
So i think these would be fine:
ie.rs-online.com
P = U x I ---> I = P / U = 27W / 14.5V = 1.8620A ===> R = U / I = 14.5V / 1.8620A = 7.78Ω
So i think these would be fine:
RS PRO, 8Ω 50W Wire Wound Chassis Mount Resistor ±5% | RS
Your calculations would be perfect if you were planning to replace your original bulb with resistor onlyI've done my calculations:
P = U x I ---> I = P / U = 27W / 14.5V = 1.8620A ===> R = U / I = 14.5V / 1.8620A = 7.78Ω
So i think these would be fine:
RS PRO, 8Ω 50W Wire Wound Chassis Mount Resistor ±5% | RS
.Also you have used incorrect base wattage of 27W instead of 21W.
What is the wattage of your original filament bulb?
You should be able to read it of the bulb itself.
Additionally you forgot to subtract the real wattage of your new LED from the original 21W
.
Well its a standard bulb: Toshiba 12V WY16W and based on the coding assumed its a 21W bulb, my LED is a 7.5W bulb so i did:
21-7.5 = 13.5. But then what i did was times it by 2 as it was said needed for both sides so that became 27W, i thought i just use 1 resistor but would i need 2 resistors?
P = U x I ---> I = P / U = 13.5W / 14.5V = 0.9310A ===> R = U / I = 14.5V / 0.9310A = 15.57Ω
Or am i just doing it all completely wrong? Why cant these vans just be simple.
21-7.5 = 13.5. But then what i did was times it by 2 as it was said needed for both sides so that became 27W, i thought i just use 1 resistor but would i need 2 resistors?
P = U x I ---> I = P / U = 13.5W / 14.5V = 0.9310A ===> R = U / I = 14.5V / 0.9310A = 15.57Ω
Or am i just doing it all completely wrong? Why cant these vans just be simple.
Oh i know Robert, i was venting at myself and not understanding the calculations properly, same with the hex coding and all that!
so do i go:
RS PRO, 15Ω 50W Wire Wound Chassis Mount Resistor ±5% | RS
or
RS PRO, 18Ω 50W Wire Wound Chassis Mount Resistor ±5% | RS
Last edited:
Maybe you should try Renault Trafic
.
I would go for 15ohm.Oh i know Robert, i was venting at myself and not understanding the calculations properly, same with the hex coding and all that!
so do i go:
RS PRO, 15Ω 50W Wire Wound Chassis Mount Resistor ±5% | RS
or
RS PRO, 18Ω 50W Wire Wound Chassis Mount Resistor ±5% | RS
HahhahaMaybe you should try Renault Trafic
Thanks for the resistor advice and help! Cheers
I have read the thread and my issue is on the side Repeaters - according to the fault light on the dash .... and the first time it happened the near side Repater had stopped working.
Since then. Start of journey all indicators worked fine, no double timing on Indicator. After an hour, then invariably we get the Double timing inside the Van and Fault light, BUT when we check all indicators - ALL WORKING OK.
The side repeaters are After Market as are the headlights and rear lights.
It was mentioned that this could be a "Resistor" needs fitting to fool the system?
I am a novice and would just like to solve this problem. Is it best to revert to the basic Repeaters .... any help and please keep it simple.
Gents I have tagged you - I hope you don't mind.
@Robert @drooke
Since then. Start of journey all indicators worked fine, no double timing on Indicator. After an hour, then invariably we get the Double timing inside the Van and Fault light, BUT when we check all indicators - ALL WORKING OK.
The side repeaters are After Market as are the headlights and rear lights.
It was mentioned that this could be a "Resistor" needs fitting to fool the system?
I am a novice and would just like to solve this problem. Is it best to revert to the basic Repeaters .... any help and please keep it simple.
Gents I have tagged you - I hope you don't mind.
@Robert @drooke
Hi @Robert This is what I do Know in Uppercase below.
What's your 09BCM Byte 18 hex value? SORRY DONT KNOW WHAT THIS MEANS? I HAVE NO ACCESS TO ANY ELCTRONIC TOOLS.
What year is your van? DEC 19
What headlamps have you got(H4, twin H7, LED)? LEDS Running - will check tomorrow AM on Headlights.
And what is the wattage of you new repeaters? 5W.
Does the above help. Thanks Paul.
Will post first thing @Robert many thanks Paul
Where are you based? I have vcds which is the program you need to get the information Robert asked in the first question. Im in Manchester if thats any use.
Many thanks Sam, do appreciate the offer. Unfortunately I am near Stamford, Lincs. Many ThanksPaul
@Robert here we go. Fyi. The double speed indicator fault happens whether turning R or L.
The photos show each LIght Off & On.
Tia Paul
What was your factory setup(headlamps type & tail lights)?
As your lights are not OEM you have to get the wattage of each indicator(front, side, rear).
You might be able to read it from the back of each light(should be stamped but I am not sure as these are aftermarket).
Alternatively you could measure it yourself or ask your seller/manufacturer.
As your lights are not OEM you have to get the wattage of each indicator(front, side, rear).
You might be able to read it from the back of each light(should be stamped but I am not sure as these are aftermarket).
Alternatively you could measure it yourself or ask your seller/manufacturer.
