When did the GM Trans Am wiring harness change?
In 1980, the whole wiring harness was overhauled and the fuse block was changed to blade-type fuses. Almost everything was changed from 1979; there are too many incompatibilities to list. In 1981, computer engine controls were used on all GM cars.
What was the wiring harness for a Firebird before 1980?
The basic wiring harness Before 1980, there were five separate pieces to the main wiring harness of a Firebird. Some cars in 1980 and all of them in 1981 used an engine control computer harness in addition to these five. The front end harness includes the horns, wipers, and front lights
How does the wiring harness work in a car?
Your car’s engine wiring harness is much like your body’s circulatory system. Just as your veins distribute the blood from your heart throughout your body, powering your every movement, a wiring harness distributes electricity from your vehicle’s primary fuse box and delivers it to the various electrical systems throughout your vehicle.
Where is the fuse block on a 1977 Pontiac Trans Am?
Four of the five parts of the basic wiring harness are joined at the firewall, forming the fuse block. This figure shows the interior side. The gang of wires plugged in on the right is the body harness, which feeds the taillights. Pontiac called this connector a “harmonica”. This is a 1977 fuse block, and it is typical of 1970 to 1979.
What was the wiring harness for a 1977 Trans Am?
Basic Wiring Harnesses for 1977-81 Trans Ams Wiring Harnesses 101 Or, my volt gauge is dead, and I don’t feel so good myself. It’s not unusual to find that the wiring on your project Trans Am has been hacked to pieces or even on fire. The Hogheads try to carefully recover the wiring in our parts cars with as little damage as possible.
Four of the five parts of the basic wiring harness are joined at the firewall, forming the fuse block. This figure shows the interior side. The gang of wires plugged in on the right is the body harness, which feeds the taillights. Pontiac called this connector a “harmonica”. This is a 1977 fuse block, and it is typical of 1970 to 1979.
Is the 1981 harness the same as the 1980 harness?
Although not fully merged, the 1981 computer and instrument panel harnesses connected on 13 circuits, most of which didn’t even exist in the 1980 harness. So, to summarize, the 1980 and 81 harnesses are each totally uniquie.
In 1980, the whole wiring harness was overhauled and the fuse block was changed to blade-type fuses. Almost everything was changed from 1979; there are too many incompatibilities to list. In 1981, computer engine controls were used on all GM cars.
What was the fuse block on a 1977 Pontiac Trans Am?
This figure shows the interior side. The gang of wires plugged in on the right is the body harness, which feeds the taillights. Pontiac called this connector a “harmonica”. This is a 1977 fuse block, and it is typical of 1970 to 1979.
What was the front end harness on a Firebird?
Before 1980, there were five separate pieces to the main wiring harness of a Firebird. Some cars in 1980 and all of them in 1981 used an engine control computer harness in addition to these five. The front end harness includes the horns, wipers, and front lights
Are there auxilary wiring harnesses for Trans Ams?
Auxilary Wiring Harnesses for 1977-81 Trans Ams Wiring Harnesses 102 (Advanced) or, now that I’ve got this thing installed, why won’t it light up? A typical person restoring a Trans Am will want to add and remove options to suit his personal taste.
Where is the lamp on a Trans Am harness?
In the photo, courtesy lamps are shown on the left and right ends of the harness. The plug that connects to the main harness is in the middle. The short orange wire right of center is for a power deck lid release, and the lamp with its metal bracket and black push button is obviously for the glove compartment.
This figure shows the interior side. The gang of wires plugged in on the right is the body harness, which feeds the taillights. Pontiac called this connector a “harmonica”. This is a 1977 fuse block, and it is typical of 1970 to 1979.
What is the shift indicator on a Trans Am?
The console-mounted shift indicator (PRNDSL or PRND21) is illuminated by a single gray wire/socket/ground clip, shown below. There’s no needle in this indicator, but it is illuminated nonetheless. Console compartment lamps weren’t available on 2nd Generation Trans Ams, so manual transmission consoles have no lights in them anywhere.
What did the 1979 Pontiac Firebird Trans Am have?
As the Trans Am was moving upscale to the buyers, new features included a power “Tri-Band” antenna (AM/FM/CB) so passers by didn’t get an obvoius look at that valuable CB radio. Seats were freshened for 1979 with the custom cloth interior being covered in Lombardy cloth with Hobnail cloth inserts in the seating portion of the seat.
When was the last Pontiac Trans Am made?
Car & Drivercited these seemingly prophetic words concerning the 1979 Trans Am in the January ’79 issue. The handwriting was on the wall. The last Pontiac 400’s were built up in 1978 and the tooling disbanded. There would only be a handful of the 220 hp motors to go around and all were to be mated to four speeds.
How do you change the belt on a LS1?
SLP lid on LS1. Before doing anything, check to see if your belt routing diagram is still there in your engine bay. If not, take a picture of the belt routing so you have an idea of how to put it back on. Then, place your 15mm wrench on the tensioner pulley bolt and turn it clockwise as far as you can go.
How can I tell if I need to replace my V belt?
Another cause of sheave damage is debris falling into the drive, which can be prevented by installing a drive guard. Signs of sheave wear include groove sidewall cupping and/or a polished groove sidewall with ridges. Use a sheave gauge (Figure 10) to detect excessive sheave groove wear, and replace sheaves immediately when worn.
What are the switches on the back of a Trans Am?
In addition to the obvious dimmer, headlight and wiper switches, this part of the harness has connections to the rear window (purple in 1980), driver’s seat belt reel switch (black), and driver’s door jamb switch (next to the courtesy lamp).