Backup Lamp Bulbs
#1
Backup Lamp Bulbs
Need backup bulbs for my 71 Cutlass. Autozone and Advance Auto, the two local parts houses both list a 90 bulb for the car. I bought a couple but the have two terminals on the base. The socket has a single wire picking up ground from the case. Does anyone know the correct bulb number for this application?
#3
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
dsolomon - it's right in the owners manual under the section on Lamp Specifications.
External Lamps - Back up (qty 2) 1156
These have only got one terminal at the bottom of the bulb. The 1157's are the ones with 2 terminals - they have to provide running lights + turn/brake indications.
#5
And 90, if my memory is correct (I am not looking it up right now), has the same base size, double bottom contacts, a smaller bulb, and a single filament, with the filament connected to both of the bottom contacts, and the base not connected to anything, as used in the convertible pillar lights... A real oddball.
As I said in a different post, "Why ask why?"
- Eric
As I said in a different post, "Why ask why?"
- Eric
#6
Awesome! I have several in the Chevelle parts bin. I guess the standard for chevy's is the standard for Olds. I read that the owners manual lists the bulbs but mine is tough to get to. When I do a resto I pull parts and load into bins. The manual is litterally the first thing to come out and bin #1 is at the bottom of the pile. Thanks for all the help.
Now for a quick rant... God I hate repop parts. One of my backup lamp housings had a corroded spring in the pigtail. I picked up a repop one at Carlisle this fall. Just went to install the bulb and it flops around in the socket like a fish. I am convinced that it will be an issue later. It just amazes me how such crap can be produced. Its like they take a shot at reverse engineering and when they find its out its not close they say "awh thats good enough". Guess I need to search for a used one.
Thanks again guys!
Now for a quick rant... God I hate repop parts. One of my backup lamp housings had a corroded spring in the pigtail. I picked up a repop one at Carlisle this fall. Just went to install the bulb and it flops around in the socket like a fish. I am convinced that it will be an issue later. It just amazes me how such crap can be produced. Its like they take a shot at reverse engineering and when they find its out its not close they say "awh thats good enough". Guess I need to search for a used one.
Thanks again guys!
#7
Cannot even get a starter heat shield (small steel plate with two holes) to have the holes drilled in the right spot.....
#8
Light bulbs are listed in the owner's manual, the Chassis Service Manual, and any Motor or Chilton manual you might come across.
- Eric
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