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"Berang" (berang) 03/26/2019 at 23:20 • Filed to: None

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I spend several days deciphering an indecipherable wiring diagram and tracing wires, cleaning connections, and grounds to figure out why the alternator light on the ‘68 Saab wouldn’t come on.

Only to find out the problem was the bulb was dead. It doesn’t look burnt out, the filament isn’t broken, and the glass is clear - but it will not pass a current. Of course I didn’t think to actually check it beyond looking at it when I started. New bulbs are on the way.

PS: if you ever go to hell, all wiring diagrams look like this.

Future Heap Owner > Berang 03/26/2019 at 23:37

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The only way to ensure the easy solution works is to do all the work for the hard solution anyways 

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > Berang 03/26/2019 at 23:37

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Color diagrams  are for weenies.

facw > Berang 03/26/2019 at 23:46

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Lighting all the warning light bulbs at startup so you can see if any are dead was definitely a good car innovation.

pip bip - choose Corrour > Berang 03/27/2019 at 05:11

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need to do it again without the diagram

SilentButNotReallyDeadly...killed by G/O Media > Berang 03/27/2019 at 06:15

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I remember numbers for colours...now it is called mindful colouring in. Mindful swearing is my reinterpretation...

MiniGTI - now with XJ6 > Berang 03/27/2019 at 08:45

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The TR6 has a bulb about that size for the passenger footwell. It was kind of dodgy for a while; I  always assumed it was something with the socket but eventually found one of the leads from the filament had come unsoldered from the base.

MM54 > Berang 03/28/2019 at 19:04

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That’s actually a decent looking diagram!

That said, first rule of troubleshooting: check the stupidest, easiest shit first. I do a lot  of electrical troubleshooting in my line of work in industrial/commercial settings, you’d be amazed how many issues people have spent hours on are things like a blown fuse, wire on the wrong terminal, backwards polarity, etc.

Berang > MM54 03/28/2019 at 21:44

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The first thing I did was pull the bulb out and look at it. Since it looked fine, I assumed it was, and that something else must be unplugged or dirty somewhere else. Oops. However, along the way I did find some other things that needed to be taken care of, so it wasn’t a complete waste of time.