Horn & Cruise control doesn't work

ZJ Limited

• 17989 Answers
• Posted on Jun 24, 2012

SOURCE: stalled & won't start

Hi there:
You will have to pinpoint what the engine is missing... Spark / Fuel / Compression

All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the engine to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should.

Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

SOURCE: Horn wiring skimatics for 2004 Oldsmobile Alero

The 2004 Oldsmobile Alero is a very reliable vehicle. It averages a 6.1 on the steering, handling, and braking tests.
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