For foggy or yellowed headlights, there's a new kit out, the 3M Headlight Lens Restoration System available at AutoZone or 3mestore.com which works great! The kit sells for only ~$20. Kit contains basically everything you need to do the job and produces amazing results. This one seems to work so well because of the household drill attachment, which many others are just hand sanding which takes forever and does not produce near the same results.
Assuming that the problem is not moisture inside the light assemblies, but oxidation of the plastic, try using a clear plastic cleaner & polish to remove the oxidation from the lenses. A lot of rubbing has worked for my 2001 Intrepid. I use a product called PLASTX by Meguiar's, Irving, CA (www.meguirars.com).
If the lightbulb itself is burnt out on a 1991 Mercury Cougar then just replace the light. If it is the wiring that is the problem then find the burnt wires and cut them. Replace them with new wiring.
Where is the headlight relay for a 1991 mercury Capri
1991 mercury cougar i need to know the egnition timing engine is a 3.8 v6.
The 3.8 liter V6 engine in a 1991 Mercury Cougar has a timing CHAIN
On a 1991 Mercury Cougar : The oil pump is INSIDE the oil pan ( the oil pan is bolted to the bottom of the engine )
According to my Chilton's Auto Repair Manual : ( A 1991 Mercury Cougar has a 19.0 U.S. gallon gas tank )
According to my Chilton"s Auto Repair Manual : For a 1991 Mercury Cougar ( 19.0 US. gallons )
My 1991 Mercury Cougar LS 3.8 4 Speed Automatic weighs in around 3800lbs.
I can't say for sure , but the ( 1996 ) Mercury Cougar is ( 18.0 US. gallons ) * also the 1991 Mercury Cougar is 19.0 US. gallons
300 pounds
According to my Chilton's Auto Repair Manual : For a 1991 Mercury Cougar : ( 19.0 U.S. gallons )
They are 5"x7" front ant rear, http://www.modifiedlife.com/1991-mercury-cougar-car-audio-wiring-schematic/
According to my Chilton's Auto Repair Manual : A ( 1991 ) Mercury Cougar has a ( 19.0 US. gallon gas tank )