Unfortunately, the wiring diagrams were not the greatest back then but I attached the info below. It appears that the C5 location is the ground for this but we can test this to find out if the ground is the issue. Here are some guides that will get us started:
https://www.2carpros.com/articles/how-to-check-wiring
https://www.2carpros.com/articles/how-to-use-a-voltmeter
Let's access the bulbs and do one of two things. First use a meter to test resistance from the bulb ground to the frame. You don't need to test directly to the actual ground location as all the grounds are connected to the frame either directly or indirectly so if you have a good connection then you will have low resistance.
The other way we can test this is to just run a redundant ground with a jumper wire and see if the light is brighter. Also, we should check voltage at the bulb as it is possible that we have a battery ground issue.
Basically these bulbs need full 12 volts and a good ground to be as bright as possible so we need to check both. Let us know what you find. Thanks
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Saturday, January 23rd, 2021 AT 5:58 AM