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Wire issues are killing me!
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I bought my 86 Silverado a few months ago. The previous owner had already removed the majority of the smog crap that cloggs up the engine compartment. I was trying to figure out some issues with my gauges and I found some wire problems. I need to figure out what some of the connectors that are loose were connected to, or can I get rid of the wires all together. I will try to attach some pictures. Thanks in advance for any help you may be able to give.
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Re: Wire issues are killing me!
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Re: Wire issues are killing me!
I think that red one in pic 3 is a factory diagnostic plug, pic 4, I'm pretty certain is a vacuum switch for the convertor on a 350c trans. that needs a vacuum line hooked to it if it still has the 350c in it. The others I can't tell.
Oh theres more, Is that one 3/8 hose coming from the brake booster? If so it needs to go to the back of the carb. That broken sending unit on the intake is part of the old smog vacuum, if it's not leaking it's ok. Clean up the vacuum lines! Trace them or plug them. |
Re: Wire issues are killing me!
Vacuum switch on the passengerside is the ESC. I removed mine. The driverside is the torque converter lock up. You want to keep that one unless you have a locking torque converter.
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Re: Wire issues are killing me!
The pictures are a little misleading. The truck has a 305 with a 700r4 tranny. The person I bought the truck from gave me a set of valve covers w/ the gaskets attached. The existing covers were leaking, so the quick fix was to slap the new ones that say 350 on them on the truck. Being that it has the 700r4 does it need the switch on the driver side(hasn't been hooked up since purchased). The red one in pic 3 is half melted. It was sitting on the exhaust manifold. Any reason to keep it?
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Re: Wire issues are killing me!
The red one is laying just about where yours is now on my truck. I'd just leave it. The 700r4 has to be wired up for the convertor to lock up. That switch could be used, but I would look and see whats plugged into the trans (driver side) and where those wires go. There are aftermarket lockup kits avail. If it is not wired up, your 700r4 isnt working right.
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Re: Wire issues are killing me!
Where does the vacuum line run to from the switch? Also, the line you thought was the booster line, isn't. It runs, along with the wire harness next to it, through the firewall. I have no idea what it goes to inside the cab.
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Re: Wire issues are killing me!
Any ported vacuum is fine. I see the booster line now. Man previous owner did some weird stuff, I see vacuum hose going into the cab where the windshield washer nozzles should be. LOL Just keep tracing stuff.
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Re: Wire issues are killing me!
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would also have a bigger hose to the brake pedal for the disconnect you will find a air line from the same place(off manifold) to the heater controls thats usally run through by the pass side one of those open round sensors is for the tranny and i heard of a sensor for differential pressure up there too on the firewall |
Re: Wire issues are killing me!
The truck does have cruise, but I don't have the carb set up for it. It doesn't go more than an hour from home, so there is no reason to spend the money to get the cruise working. As far as the brake comment, what is the disconnect for? It seems to me that since most things on the truck work, most of the stuff that is disconnected may not be completely necessary. I'm not as concerned with the vacuum stuff. Want to still know what it is, but I really need to figure out the wires.
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Re: Wire issues are killing me!
the orange bit should go to the back of the manifold
for heater controls and there should be a hook up to the tranny sensor from what i've learned/read the tranny sensor needs to hookup,bad without the disconnect just tells the cruise to turn off when the brakes go on that big line to the pedal can be removed i've used a smoke (or insence)to check for vac leaks on sensors,some work cold ,some hot |
Re: Wire issues are killing me!
Any idea on the harness that is taped to the hose that goes to the pedal?
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Re: Wire issues are killing me!
no sorry....hate the way pics shrink on here can't see
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Re: Wire issues are killing me!
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this may help it's tbi but simular hook up
fix the vac leaks it helps gas mileage |
Re: Wire issues are killing me!
hahaha been there done that game, do a search for my user name of all posts ive posted and ull see several posts containing detailed wiring diagrams.
hope u figure it out. |
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