Electrical - Bus bar question

[jedatide]

What is the purpose of the (looks like a grounding wire with a diode) between the positive and the negative bus bars located on the firewall in the engine compartment. Mine is broke in two; but 85 Blazer still runs. Is it for some kind of noise suppression? Anyway, I guess I need to replace it. Anyone know where I can find one? I need to know what it is.

 

[Rvitko]

Noise suppressor. It is 3 ceramic caps, 1uf, .1uf and .01uf, but it is not critical.

 

[jedatide]

Noise suppressor. It is 3 ceramic caps, 1uf, .1uf and .01uf, but it is not critical.

thank you!

 

[Guyfang]

But without it, your radio will make some strange noises. Truck still runs fine.

 

[MarcusOReallyus]

Unless you are running a communication radio, you don't need it. Just take it out.

 

[jedatide]

I do not have a radio yet; but, I do plan on putting one in. So, it should not be needed for a standard AM/FM radio?

 

[MarcusOReallyus]

Shouldn't be. Did GM have one on their civvy models? I don't think so.

Remember, the military has different needs than we do.

Easiest thing is to just remove it. If you install a radio later and find you have some noise, it's easy to pop in another cap to replace it, and it's not at all critical that it be exactly the same thing. Don't stress about it.

 

[jedatide]

Truly appreciate the insight and time. Thank you.

 

[cuellar55744]

Just bought a 86 1009 running great til lost all power to headlights, dash, break lights, the service switch itself has no power running to it. Anybody have an idea of where i start. Checked fuses in fuse box and all good. Thanks for ANY info on lighting/electrical system.

 

[cuellar55744]

Just bought a 86 1009 running great til lost all power to headlights, dash, break lights, the service switch itself has no power running to it. Anybody have an idea of where i start. Checked fuses in fuse box and all good. Thanks for ANY info on lighting/electrical system.

 

[Barrman]

Go back to the fuse panel. Wiggle the 3rd fuse up on the far right with the light switch on. You will probably get lights or at least a spark as that fuse burns up.

I just assumed that that you know about the black out light switch. It is on the service light setting, right?

 

[MarcusOReallyus]

Just bought a 86 1009 running great til lost all power to headlights, dash, break lights, the service switch itself has no power running to it. Anybody have an idea of where i start. Checked fuses in fuse box and all good. Thanks for ANY info on lighting/electrical system.

Well, start by reading this, then this, then check out these.