Thread: What is my cossie headlight bulb called
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Old Sep 19, 2008 | 10:05 PM
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iansoutham
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Originally Posted by SteveB
H1 is high beam (inner lamp) single pin, H4 is the dip/high beam (outer lamp) 3 pin
Close, but not quite....

The outer lamp is a H4 (bi-filament) and the inner main beam one is a H3.

The H1 has pin on the end and the H3 has a "tail".
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