Headlight Replacement

We Can Rebuild Them, We Have The Technology.

Headlight Replacement

Postby Bushman » Sat Sep 13, 2014 3:52 pm

Stumbled on some 1157 bulb sockets at O'Reilly Auto Parts for $2.99 each. Picked up a pair to try out on an E-15 for a customer. A pair of bulbs was about $5.

Removing the old sockets was a bit of a pain, but pryed up the edges on the inside and twisted them out with a pair of pliers.

Installed the new sockets easily (same 3/4" hole size) and the new bulbs.

Already knew automotive bulbs needed to be grounded through the socket, so I isolated the whole reflector from the tractor with some rubber trim I purchased from McMaster-Carr a few years ago to cover the edges of sheet metal on my pontoon boat. I think the slot is 1/4" deep and 1/32" wide. Slid right over the edge and serves the purpose perfectly.

Also added a ground wire on each reflector and tied them both to the light harness ground wire, in this case, wire #32, I believe. All wires from the sockets were connected to wire #21, the positive coming from the switch.

The 1157 bulbs have dual elements that provide more light than the originals and a more available bulb. I have some extra rubber trim, so if anyone wants to use this idea, I can ship some out. You only need about 12" per reflector.

Chad
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Finished_Package.jpg
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RubberSleeve_Reflector.jpg
RubberSleeve_Reflector.jpg (104.44 KiB) Viewed 1130 times
1157Socket_Package.jpg
1157Socket_Package.jpg (71.61 KiB) Viewed 1130 times
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Bushman
 
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Re: Headlight Replacement

Postby JohnM » Sun Sep 14, 2014 1:43 am

image.jpg
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My easy headlight upgrade: Cleaned up the reflectors with steel wool. Masked the socket, front & back with painter's tape. Spray painted chrome on the reflector, black on back. Replaced old yellowed and cracked lenses with clear plexiglass I made from scrap. The 2 watt LED bulbs have the same base and easily fit. Ordered on line from superbrightleds, item 1142-CW18-T. A bit pricy, $18 each. They are very bright white.
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Re: Headlight Replacement

Postby Bushman » Sun Sep 14, 2014 2:03 am

$18 a bulb is a bit expensive, especially for only 2W, but I wonder how they compare overall. Either way, the bulbs probably still ground through the case like the other automotive bulbs, so it has to be isolated.

I realize the grill piece is aluminum and bolted to the frame, but still, things seem to find a path no matter what at some point.
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Re: Headlight Replacement

Postby JohnM » Sun Sep 14, 2014 1:08 pm

The E15 bulb uses a 1142 dual contact bayonet base. The bottom contacts are positive and negative. There is no connection to the base. The 1142 is used for single intensity bulbs in ungrounded systems. The 1157 base looks the same but both bottom contacts are positive and the base is negative. This is used for dual intensity bulbs in grounded systems, ie automotive brake lights.

That 2 watt LED bulb really outperforms a15 watt incandescent.
Last edited by JohnM on Tue Sep 16, 2014 8:41 pm, edited 1 time in total.
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Re: Headlight Replacement

Postby FarmallMan » Mon Sep 15, 2014 1:29 pm

A quick search of the web yields the following data:

1157: 440 lumens (402 H + 38 L, since you are running both filaments at the same time) at 35.7 watts (27.3H + 8.4L) for an efficacy of 12.3 lumens/watt. Chad, keep an eye on the lenses - they might get pretty warm.

1142 LED: 120 lumens at 2.1 watts (12V x 175mA rated current) for efficacy of 57.1 lumens per watt. If the same type of source could be found with all the LEDs facing "forward" this would help effective use of the lumens greatly.

Neat projects, either way.

Nick 8-)
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