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ALT light bulb replacement |
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george w
Supporter of TheAMCForum Joined: Jan/27/2013 Location: New Jersey Status: Offline Points: 2899 |
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Posted: Nov/27/2017 at 9:34pm |
The 158 bulb is a wedge base. The 1445 is a bayonet base so the 1445 won't work. What's the electrical characteristic that differs between these two bulbs ? Are we looking for a replacement wedge bulb that is rated higher or lower in amp draw, or wattage ?
The 158 is rated at 3.5 watts, 2 CP. The 1445 is rated at 1.87 watts but I can't find a listing for the CP. Here's what I can find in wedge base specs. From what I can tell these are rated at 12 volts. 158 3.5 Watts 161 5.0 Watts 168 4.0 Watts 194 3.0 Watts I haven't found a wedge base bulb with a wattage rating of under 3.0 watts. I have to assume that the lower the wattage, the lower the CP and the lower current draw meaning a higher internal resistance. If all else fails try a #194 ?? |
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Long time AMC fan. Ambassador 343, AMX 390, Hornet 360, Spirit 304 and Javelin 390. All but javelin bought new.
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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You may have seen my post on alternator/charging system tests - I have a post there that contains this tidbit:
According to AMC, replace the original equipment #158 bulb with their service replacement, bulb number 1445. AMC deemed the 158 may be too sensitive. However, as you noted, there's a difference - and AMC also had a KIT that was bulb AND SOCKET. So, you need to find the correct socket as well.
The technical service bulletin gives a kit number, bulb and socket. |
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