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Question

1987 Buick LeSabre Fuse box


Sent to Car Experts August 21, 2007 2:18 a.m.

Vehicle turns over but has no spark. Where do we find the fuse box? Any other Ideas as too what may be wrong?

Optional Information:
1987 LaSabre T-Type 3800

Already Tried:
Checked Spark at cables, no spark. Engine Cranks over no problem but no spark.
Customer (name blocked for privacy)
Status: Closed   Value: $9   
Answer
August 21, 2007 2:52 a.m. (33 minutes and 41 seconds later)
ACCEPTED Check Mark

Hi Mark Betsy,

This could get really involved because there are so many things in the electrical part of the ignition system that could keep it from running. I will give you some information on the fuses first and then ramble on for a while.

Fuses (located on a swing down unit near the steering column or in the glove box) protect all the major electrical systems in the car. In case of an electrical overload, the fuse melts, breaking the circuit and stopping the flow of electricity. Test them with a volt meter or test lamp, not by eyeball.

A couple of other things to look at that are pretty easy, after you verify that you have voltage through the fuses and to the coil pack would be connections at things like the cam shaft sensor and the crank shaft sensor. There are many parts on this motor that would keep it from getting fire. Have you looked inside the valve cover through the oil cap to see if you can determine if the valves are moving? We want to be sure it has not dropped a timing chain or something like that and if the cam doesn't turn it can't run. You could also verify this with compression test. If we look good so far, I think I would call some parts stores in the area and see who could or would test some electronic components like the coil packs and modules for you. Many parts stores will do this as a free service in hopes of selling replacement parts. Some of them can only test some parts and some other can test other parts, etc. If you could even rent a class 1 OBD scanner and check the computer for codes, that would be a good starting place. I can't remember what year they changed, but if your car has a distributor, check the cap for cracks and the rotor for burnt spots. Anything inside the distributor that will allow voltage to go to ground will keep it from running. Also make sure the distributor is turning when the motor is cranked. They break drive gears and things like that, too. If you can't beg, borrow, steal or rent a scanner let me know and I will tell you how to jumper wire the ALDL connector to read the codes. Let me know how you do as you go and we will pick it up from there. Thanks Bob. (Chart below I have for vin#'s 3-C and L. The 8th digit in the vin number of the car )

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PictureBob  -- Auto Service Technician -- 99% Positive Feedback on 981 Car Accepts
40 year GM Tech. +30 Certified. ASE Master Tech.(expired, retired) Medium Duty, Heavy Line, Retired
Reply
Sent August 21, 2007 3:00 a.m. (8 minutes and 23 seconds later)

No distributor on these LeSabre's but I will start going through your check list, God Help me. Mark
Customer (name blocked for privacy)
Answer
August 21, 2007 3:04 a.m. (4 minutes and 6 seconds later)

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PictureBob  -- Auto Service Technician -- 99% Positive Feedback on 981 Car Accepts
40 year GM Tech. +30 Certified. ASE Master Tech.(expired, retired) Medium Duty, Heavy Line, Retired

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