Q: Electrical issues with Chevy Cobalt SS 07

asked by on April 24, 2017

I'm not getting any spark. I bought the car from a guy who had very little idea what he was doing and he turned the wire harness into a mess. Random splices, wires loosely connected or just hanging freely. I had to replace the transmission and the fuel pump. After I went to hook up the starter and the power wire was automatically firing the starter when I touched it to the solenoid. Found the wiring was backfed to the alternator. Fixed that. Then the car wouldn't shift from park so I tore into the linkage cable and found the Neutral safety switch wasn't grounded. Fixed that. But now the cars not getting spark. Changed all the plugs and injectors. Tested the relays and fuse box they all have power but the plugs to the injectors don't get power. Its been lost somewhere. Checked the whole wire harness and theyres no bad splices or wires. I've tested the Ingnition control switch, engine control computer and on board computer and they all have power. Any ideas as to what my problem may be?

My car has 114765 miles.
My car has an automatic transmission.

Hi there. It appears you have a serious electrical mess on your hands. In most cases, instead of trying to trace an issue where there are "customized alterations", it may be a better idea to completely rewire the vehicle’s ignition system. There are several electrical harness kits for GM’s available online that are rather simple to install.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Car has electrical problems and starting issues

My guess is that the problem is with the body control module (BCM). The BCM functions as the power mode master (PMM). In this role, it receives an input from the ignition switch when the key is turned to the...

I have rusted rocker panels on both sides of the car is it worth saving?

Hi there, thanks for writing in. Body shop prices vary widely, mostly based on where you are, and how good the body shop is. If both your rocker panels are truly rusted out, it will probably far exceed the value...

How do I control the windshield wipers?

Both the windshield wipers and the windshield washers can be controlled with a lever located behind the steering wheel. There are two levers, used to control a number of things on the vehicle, that stick out a noticeable amount from...

Related articles

2012 Chevrolet Traverse vs. 2012 Toyota Highlander: Which One Should I Buy?
Large SUVs are a huge and broad market, with a range of different offerings from economy to luxurious. The majority of the SUVs and crossover SUVs offer decent gas mileage, plenty of room for friends and family to ride along...
The Best Used Cars to Buy If You Need a Lot of Trunk Space
Many Many people focus more on interior room than cargo carrying capacity. That’s natural if you have a large family or regularly carpool, but what about drivers who need to carry a lot of stuff most of the time and...
A Buyer’s Guide to the 2012 Chevrolet Sonic
The The 2012 Chevrolet Sonic is not only the only domestic subcompact sedan (or hatchback) on the market today, but it’s also one of the most versatile models in its class. This entry-level subcompact car – available in both sedan...