my blazer keeps blowing a fuse for what im quite sure is the fuel pump . theres times when it works just fine and then quits on me . what would cause a fuse to blow and work fine and then blow again . as soon as i try to put the fuse in it instantly burns it . would an old fuel pump cause a fuse to burn like that.i cant seem to find the short along the wires ,
2007-02-17 13:36:00 · 3 answers · asked by EL-JEFE 2 in Cars & Transportation ➔ Maintenance & Repairs
There is a short in the wiring to the fule pump and it is grounding out causing the fuse to blow check the wire in places where it may have rubbed causing the wire casing to rub off. ( Try this first) from my husband
2007-02-17 13:42:06 · answer #1 · answered by Gina 4 · 0⤊ 0⤋
Your problem could be the fuel pump, the harness running along the frame, or the pump test wire. First, crawl underneath and disconnect the large gray plug near the gas tank. There is a white or red clip that locks it together, pull that out first. With it disconnected, try a fuse. If it doesn't blow with the ignition on, its the pump or the wires leading to it. Either way the tank's coming out. If it does blow, the problem is elsewhere in the electrics. Check that your pump test wire isn't accidentally grounded. It is a gray, single wire connector, dangling in mid air near the battery, and should not be connected, nor touching anything. If that is ok, open the under hood fuse/relay centre and pull out the fuel pump relay. It tells you which one on the inside of the lid. Disconnect the electrical plug at the tank and put a test light from the positive terminal of the battery to the pump test lead. The light will be on indicating a short. Go underneath while someone watches the light. Pull, tug and move the wiring harness along the frame. When the light goes out, the area you just touched has the short. Open the harness and do a repair. Just remember to reinstal the relay and fuse before trying to start it.
2007-02-17 21:56:38 · answer #2 · answered by shopteacher 4 · 0⤊ 0⤋
The short is right behind the distributor,the harness runs over the back of the engine and rubs through the insulation.Repair the wire(s) and cover with a rubber hose,this will fix it.I dropped the tank,replaced fuel pump did not fix,finally talked to a GM driveability tech, had problem solved in an hour.
2007-02-18 00:24:57 · answer #3 · answered by DICKLASVEGAS 2 · 0⤊ 0⤋