Question about Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: wiring diagram for 1997 vw jetta
Russan tech site
Translation sucks but has some killer wiring diagrams
Posted on May 23, 2009
SOURCE: 1996 chevy Impala SS
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I'm sometimes accused of not giving short answers. However, my philosophy is that too much is better than too little.
Still with me?
This is how your problem is researched in my shop. Out of the box, I'd say that you have a problem with the fuel management system. However, there's a good chance that it's something simple and inexpensive like a clogged fuel filter or water in the fuel tank.
My second area of concern would be the manifold pressure sensor which is located under the hood, center, rear engine area, above valve cover, mounted in bracket. However, you must remember that these are nothing more than starting points and not guaranteed solutions at this preliminary stage.
First a little background for your edification. You may be aware of all this but we've never done business before and all assumptions are off the table.
For an engine - make that any engine and irrespective of manufacturer - to run, you need three things to happen inside the engine, compression, fuel and ignition, without any one of these components the engine will not run.
• Compression - Engine compression caused by crankshaft rotation and pistons moving up and down inside the engine block. If the timing belt or timing chain fails it will cause the camshaft to become out of correlation with the crankshaft or allow the camshaft to stop rotating. Either of these conditions will cause the engine to lose compression and sometimes cause internal engine damage.
• Fuel Delivery System - The fuel system includes: fuel pump, fuel injectors, pressure regulator, fuel filter and pressure lines. This system is used to supply fuel under pressure to the fuel injection system, the lack of fuel pressure or volume will cause the fuel delivery system to fail and the engine to stall or not start.
• Ignition Spark Delivery System - The ignition system components include: spark plugs, spark plug wires, distributor (if applicable), crankshaft angle sensor, camshaft angle sensor, ignition coil, ignition module, knock sensor and PCM (powertrain control module). The engine relies on the ignition spark to be delivered to the combustion camber at the correct time. If the ignition spark stops or is delivered at the wrong time the engine will not run or run poorly.
Whenever your engine cranks but does not start, runs rough, staggers, sags or cuts off, follow this Troubleshooting Guide. Some of these steps require a code scanner. They are costly but AutoZone will loan you one for FREE.
Most vehicles operate by the same principle; basic troubleshooting procedures apply to most cars.
• Step 1: Anytime you have a problem with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, Air Bag) inspect all fuses using a test light and check the under hood power distribution center and under dash fuse panels. If all fuses test okay continue to the next step.
• Step 2: To check for problems with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, Air Bag) and the fuses test okay a trouble code scan - borrowed from AutoZone - is needed to identify any system trouble. Use this easy-to-use simple scanner tool to retrieve trouble codes and see if they relate to the specific problem, like a crank angle sensor failure code. If the trouble code present does not pertain to the immediate problem like an EVAP code ignore it until a later time, after the car is running.
NOTE: Scan the system again after the vehicle is running. The reason is that non-related codes can be detected after the engine is running because sometimes false codes can be triggered by the engine not running. Once the engine is running again the code present might cycle and turn itself off. You might say "if the engine doesn't run shouldn't it have a trouble code?" Sometimes conditions occur that will not be detected by the computer, example: if the fuel pump fails the computer cannot detect the failure, so the engine doesn't start and the computer thinks everything is okay with no codes. If no trouble codes are present proceed to the next step.
If you have trouble using the code scanner or interpreting the codes click on the following link and use my access code (carrepair): Free Automotive Repair information for Users of a Code Scanner www.repairpath.com
All the best
Posted on Jun 23, 2011
I am sorry but Fixya has no wiring diagrams of any kind. Ford copyrights these and they are not free to share. You can buy the Ford booklet that contains all wiring diagrams HERE
Posted on Jul 03, 2012
Some of the auto parts stores have repair info online - otherwise you can get a repair book from them or Ebay. Also on CD.
Posted on Jul 03, 2012
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It can be faulty
cruise control switch. If the switch is replaced, then it can be wiring issue
or faulty cruise control board. But as the switch is replaced, get the voltage
at the switch tested to confirm the switch is actually receiving voltage. If no
voltage received at switch power supply wire then, apply external 12
volt power to the cruise control switch wire and then see if cruise control
comes ON. If yes, then you know wiring is issue.
On this case, to troubleshoot this problem, there are solved help links. Click the link directly and refer the details to solve this problem yourself, with help of diagrams: ------
These will help.
Dec 06, 2012 | 1995 Cadillac DeVille
this case, to troubleshoot this problem, there are solved help links. Click the
link directly and refer the details to solve this problem yourself, with help
of diagrams: ------
and cruise control not working on Plymouth Grand Voyager?
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