if you disconnect the o2 sensor cable in the air intake then start the engine you would see the check engine sign turned on in the gauge panel. It is on then the sensor is working if off the the sensor may have problems
Check this link http://carfix.stufftoread.com/find-parts.html
Check fuses Check bulbs
check if you have fuel and spark it needs both to work
On my 93 suzuki sidekick the check engine light came on at exactly 120000 miles.It can be reset if you take your drivers side speaker out you'll find a switch in there to reset it.If the problem occurs again then you probably have a real problem.If you vehicle is not running any different then I wouldn't be that concerned.
Usually a problem in the emission control system - have vehicle scanned to determine the problem
how do you check the abs sensor on a 1998 contour
Try at least four, check the dipstick and see where you are from there. I have a '92 with a '98 engine and it uses four quarts.
check that the wire on the sylenoid is hooked up. also, check for clean connection to the battery terminals. I have one that looks clean but if it's not bright and shiny, it causes problems.
maybe your a/c has problems try to check the a/c maybe its time for maintenance or repair
get the CEL checked and fix the problem. Disconnecting the battery for 15 minutes will reset the light on an OBD1 vehicle.
place the Diagnostic jumper and read out the flashes. http://www.kick-fix.com/CEL/CEL.html this looks complex but it covers 89 to 95 FED and California cars. then post your DTC errors here. code 12 is normal , but you will have others. http://www.suzuki-forums.com/suzuki-sidekick-escudo-vitara-geo-tracker/
check the electronic fuel pump harness for shorts at connector ends