Flicker brake lights

[Stevethemagpie]

Hello. My son purchased these new led flicker brake light bulbs for his ute (they flash for 3 seconds then go solid).
They work fine with engine off, but with engine running they simply go solid straight away.
Any advice?

 

[Avo Mk8]

An interesting situation - I came across this (from USA I think):

FAQ — Blinking Brake Lights

Frequently Asked Questions

blinkingbrakelights.com

Does your son's vehicle have a CANbus, which is a further complication?

Suggestions I've seen include trying the bulb in the holder the other way round, using a resistor (presumably across the bulb), or putting a capacitor across the bulb! No idea of values!

Of course putting an LED bulb in a brake circuit that has bulb failure detection designed for an incandescent bulb may also lead to warning messages on the dashboard!

 

[Stevethemagpie]

An interesting situation - I came across this (from USA I think):

FAQ — Blinking Brake Lights

Frequently Asked Questions

blinkingbrakelights.com

Does your son's vehicle have a CANbus, which is a further complication?

Suggestions I've seen include trying the bulb in the holder the other way round, using a resistor (presumably across the bulb), or putting a capacitor across the bulb! No idea of values!

Of course putting an LED bulb in a brake circuit that has bulb failure detection designed for an incandescent bulb may also lead to warning messages on the dashboard!

No canbus, older car 2007 Triton, very basic.

 

[DPG]

The main difference with the engine running will be the higher voltage (around 14.5VDC). It shouldn't matter, but do you have a variable power supply you could use to try this theory?

 

[Stevethemagpie]

The main difference with the engine running will be the higher voltage (around 14.5VDC). It shouldn't matter, but do you have a variable power supply you could use to try this theory?

No I don't. I will try them in my new ute when it arrines in 2 weeks. Thanks for your suggestions though.

 

[UNG]

No canbus, older car 2007 Triton, very basic.

CANbus has been used in vehicles in one form or another since the mid to late 90's so your vehicle will have a CANbus connecting all the ECU's

 

[Avo Mk8]

CANbus has been used in vehicles in one form or another since the mid to late 90's so your vehicle will have a CANbus connecting all the ECU's

I was under the impression CANbus was more a European thing and may not have been adopted so quickly for the Australian market?

 

[UNG]

I was under the impression CANbus was more a European thing and may not have been adopted so quickly for the Australian market?

The US mandated the OBD-II standard for cars and light trucks in 1996 and in Europe the EOBD standard was introduced in 2001 for petrol and 2004 for diesel. Also there was a lot of vehicles both petrol and diesel around that were using CANbus pre the 2001 implementation date
I would suspect that many vehicles in Austrailia had CANbus around that time given that a good number of their vehicles are derivatives of European, US and Japanese vehicles which all had CANbus at that time

 

[nicebutdim]

I was under the impression CANbus was more a European thing and may not have been adopted so quickly for the Australian market?

Possible, but I've not seen a Japanese vehicle of that age that didn't have multiplex wiring - both UK spec and imported.