Does LED replacement in aftermarket bumper require mods/precautions?

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Witbobbejaan
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Does LED replacement in aftermarket bumper require mods/precautions?

Post by Witbobbejaan »

Hi All,

My front TJM bumper park/indicator lamps on the 4.5 are rusted and need replacement. TJM says they have LED replacements that'll fit and will be "plug & play".

I see some of you are having unexpected trouble with LEDs.

Is there anything I need to be aware of, installing these LEDs? E.g., I recall someone wrote of radio interference with bigger LEDs somewhere....

Changes to the electrical system required?

Thank you.

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Peter Connan
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Re: Does LED replacement in aftermarket bumper require mods/precautions?

Post by Peter Connan »

Indicator timing may be thrown out. IE they flash much faster, as if one buld is blown.
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Re: Does LED replacement in aftermarket bumper require mods/precautions?

Post by Witbobbejaan »

Thanks Peter. I asked the supplier if this will be a problem on their plug & play lamp, and if additional relay/flasher autoelectrical work would be required. So far I've heard only crickets... :yellow:

UPDATE: They've come back and said that yes, they've had such problems in the past. If it happens, have "a resistor that needs to be installed inline to bring yhe current down to math the amps that the led lights is using".
Last edited by Witbobbejaan on 13 Jul 2021 00:43, edited 1 time in total.

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Re: Does LED replacement in aftermarket bumper require mods/precautions?

Post by hugejp »

My led replacements definately caused fast flashing, Ant helped me sort it.
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Re: Does LED replacement in aftermarket bumper require mods/precautions?

Post by Spike »

Not fog lamp related and not related to your model of patrol, but still patrol LED trouble related.

I had an electrical/electronic problem for months on my 4.8GRX. It messed with a wide spectrum of the system. Engine management, parasitic drains, warning lights, limp modes, not starting, you name it.
One day I spotted something on an overseas forum that sowed a seed in my mind and I replaced the LED interior light in the ceiling and the problems disappeared. Apparently the complex electronic system relies on miniscule volt/amp/ohm readings for the various integrated modules to function properly. I'm pretty reluctant to make any changes in future on this particular (grx electronic everything) patrol.
:oldtimer:
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Witbobbejaan
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Re: Does LED replacement in aftermarket bumper require mods/precautions?

Post by Witbobbejaan »

Thanks for the tip JP!

Spike, that's wild! I recently replaced a stock interior ceiling dome bulb with an LED on the TB45, so far no trouble, but if something goes wrong, I know where to start looking. Great tip!

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