How do i find the 1999 Buick century headlight wiring i also need to find the wiring schematic for the windshield

SOURCE: How to change a water pump on a 1999 Buick Century 3100?

the water pump on the 3.1 isnt to hard to change ...

1. Disconnect the negative battery cable.
2. Partially drain the cooling system into a suitable container.
3. Remove the drive belt guard.
4. Loosen the water pump pulley bolts before removing the drive belt. This should help keep the pulley from turning as the bolts are loosened.
5. Remove the drive belt. Remove the water pump pulley bolts and remove the pulley.
6. Remove the water pump bolts and separate the pump from the engine front cover.

SOURCE: 1999 Buick Century thermostat question.

patience , and a 13 MM wrench , you gotta get your arms in there deep , that lower bolt does not need to come all the way off , the thermostat housing has a slot at the bottom for easier access , loosen it about 3.4 of the way and you can get the housing out , experience says a premium thermostat will give you grief trying to reinstall , get a regular duty thermostat .reverse procedure.

SOURCE: 1999 Buick Century headlights don't work properly

Iam an ASE Certified mechanic and i had the same problem with my 99 century and i wasnt able to drive at night. After hours of testing wires we came to the problem. Its the turn signal switch assembly which is tied into the hazard switch on top of the steering column. Its all one piece with a 3 foot long wiring harness attached to it running down the bottom of the steering column and going underneath the dash. The least expensive place i found the part and had it in stock was my local Auto Zone and still the part was $200.00.

P.S. This is a common problem on these GM cars. Mine did the same thing to the tee! The lights will go on and off then they just went off for good and this solved the problem. I guarantee it. If you have any questions please email me i will do all i can to help.

Joseph Reichwein

• 71 Answers
• Posted on Mar 11, 2009

SOURCE: Buick Century wipers out of sync

You could also see if the bolts holding the wipers on came loose from the snow and ice. Pop the cover off, loosen and straighten the wipers where they should be and tighten.

SOURCE: need buick century egr diagram

If your car runs bad with an EGR code then I would suggest that the EGR valve be replaced. I would like to know what code was set on your computer. It would help greatly. When the EGR malfunctions, you will have rough idle and possible stalling. If you have a code indicating EGR it may also condem the cat converter.Please show any codes that are set. Thanks Moe