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The oil pressure switch on a 2005 Isuzu Dmax with a 3.0L engine is located on the engine block, near the oil filter. Here are some steps to locate the oil pressure switch:
Locate the oil filter on the engine block. The oil pressure switch is typically located close to the oil filter.
Look for a small electrical connector attached to a sensor located on the engine block. The oil pressure switch will have an electrical connector attached to it, which distinguishes it from other sensors located in the same area.
Follow the wire from the electrical connector to the oil pressure switch. The oil pressure switch will have a wire leading from the electrical connector to the switch itself.
Once you have located the oil pressure switch, you can replace it if it is faulty or damaged. It is important to ensure that the engine is not running and that the oil has cooled down before attempting to replace the switch to avoid injury. Additionally, make sure to disconnect the battery to avoid any electrical shocks.
Depending on engine model traditional Buick design V-6 3800 switch is located in oil filter adapter housing can be seen on passenger side through wheel well. takes a deep 1 1/16 oil pressure socket to replace. Other model Chevy base V-6 3400 located next to oil filter on the front side of engine just above engine cradle frame this one uses a shorter sensor can be replace with a standard socket. 1 1/16 also
The first order of business is to check the oil pressure while the gauge is not working. If the oil pressure is fine and the system reading zero, there is a fault in the oil pressure switch circuit. Often, the problem is related to the oil pressure switch itself. I have seen cases, too, where the oil pressure switch fails internally, causing oil to push past the seal and into the wiring connection causing a short. The wiring harness has a single pin.
Another area, though it fails much less often, is a break in the wiring between the oil pressure sender/switch and the ECM module (located in the right passenger footwell) and between the ECM and the instrument cluster. The instrument cluster may also have a short, though the sender is the most likely issue here.
-Ed
ASE Certified Master Technician since 1984 - Everything from toy cars to the largest of trucks
Consultant for the North Carolina Consumers Council
Forget about the oil pump. I haven't seen it either but by experience, 99.99% of pressure problems are not caused by the pump but are the result of either an obstructed pump pickup or a bad rod or main bearing. Since yours is very noisy, I'd be willing to bet that a bearing has failed (one or more). To do a proper repair, the engine needs to come out and be completely torn down and rebuilt. Anything short of that will leave debris inside where it will make short work of any repair you make. Your best option now is a scrapyard or remanufactured engine. I know that's not what you wanted to hear but it's fact!!!
The 700 is a generic transmission malfuction code. Anything that goes wrong wih the solenoid package will set this code. The other I haven't seen, typo maybe? If it is 703 then it is a brake switch circuit b malfuntion. The 700 will need more diagnostics to find whats exactly wrong with it, or you can replace the entire solenoid package in the transmission. 703 replace the brake switch on the brake pedal. Most solenoid packages come out fairly easy, just messy. Drop the pan,lots of oil, remove the filter,usually just snaps in, some bolt in, About a dozen bolts and remove the solenoid package.
Left ( driver's side ) front of the engine on the 5.4L engine.
This is shown to be at the end of the baffled area of the intake, the edge of the pleated area farthest from the airfilter ( looking at the engine, the left side of the pleated folds ). When you locate this, look down the front of the engine.
The connector is a black 1 pin connector with a White w/ Red Stripe wire to it.
You might have to remove the factory air intake plastic housing to see it.
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