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International Automotive Technicians Network
Re: 20$ Load Test Tool
Posted to Technical Tips Forum on 7/8/2018 5 Replies

That is neat. One caveat though: Bulbs have a lower resistance cold than they do hot. A headlamp bulb can easily pull over 20 amps momentarily when first turned on. ECM drivers intended for lower amperages don't like that. As such I use bulbs when testing ligh... Login to read more.

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