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What make vehicle an year an model . You need to look at power distribution diagram an see where those fuse's get B+ voltage from . Code reader saying not connected would suggest the PCM/ECM has no power either . Go to http://www.bbbind.com/free_tsb.html free wiring diagrams . Enter vehicle info . year ,make , model engine size . Then under system click on electrical distribution , subsystem click on power distribution . Then you can trace were power to those fuse's comes from . Do you know how to read a wiring diagram ? go on you tube an check out videos on how to read wiring diagrams .
You need to look at power distribution for your vehicle an see where those fuse's get there power from . Probably one of the larger ones in the under hood fuse box. Maxi fuse ! You can go to www.bbbind.com/ for free wiring diagrams. On the home page click on technical information , five box will come up ! Click on tsb's an free wiring diagrams .The next page go to the bottom an click I agree . Next page click on wiring diagrams ( under TSB'S ) .Then enter your vehicle info. year , make , model ,engine . Then under system click electrical distribution , under subsystem power distribution . Then click the blue link .
No power to switch? Turning key to on does not cause dash warning lights and gauges to turn on? Recheck battery connections and double check fuses.
If the switch has no power, could be a fuse or a fuse link. You can check the maxi fuses for power with a voltmeter or test light. Those maxi fuses would be hot at all times, so make sure all have power and are not blown.
click on TSB's and wiring diagrams, free. agree to end-user license agreement, next page- click on Wiring Diagrams and enter vehicle information. Then you will pick the system and sub-system to view. I would start with System: electrical distribution. Sub-system: Power Distribution. Then you can see how the ignition switch gets power from the battery.
You will have to cover every circuit that fuse protects, until you find the shorted device, motor, component, or the wiring with it that may be shorting to ground. A maxi fuse can be for a particular heavy draw, like the headlight switch, or rear defroster, or it can be a power distributor to potentially many other circuits, which may have their own smaller-amp fuse to protect the individual circuit. In short, you badly need a wiring diagram that shows that maxi fuse and all its dimensions.
Go to TSB's & wiring diagrams, agree to end user license agreement, next pg. click on wiring diagrams, and enter vehicle information in the drop down boxes. Look for diagrams under Electrical Distribution, subsystem- power distribution. You can start there, lots of wiring diagrams for every system on your car. It is a huge free database for every car (almost) going back to 1986.
The only power in the inertia switch is when the fuel pump wire has power-and only when the pump is demanded to run-during the initial pressurizing of fuel lines (for about 2 seconds) when key is turned to ON, during cranking, and during running of the engine. Power to the fuse block will come from the power distribution box-the fuse/relay block-under the hood. Check all your maxi fuses. One of them will supply power to the fuses, or if not them, then there will be a fusible link just off the battery that distributes power to various circuits, including the fuse box. But first check the maxi fuses. Same for the relays: the power feed for them will also be a power distributor- a maxi fuse or fusible link. If a wiring diagram would help you, register for free at autozone.com, listing make, model, year, and engine size. Car specific wiring diagrams and repair procedures are then available to you. Look under repair guides, may have to look around for wiring diagrams, sometimes under chassis electrical, sometimes a stand alone entry, but it's there. Also a component location guide-it may show where or what those two relays are. The wiring diagram may show, should show, how power gets directed to the fuse box. Good luck.
The fuse box by the battery should be directing power to the fuse box inside, either through a maxi-fuse or a fusible link. Check your maxi-fuses, if all are good look for a blown or melted fusible link. If still no help, consult a wiring diagram.
The wiring diagram is showing two 60amp maxi fuses coming from the battery post in or under the fuse box. The box is called the underhood accessory wiring junction block so it may only hold 2 or 3 fuses. The two maxi-fuses power most of whats in the main fuse box.
I would start by checking the earths in the engine bay-there is noramally one that secures to the front panel and one goes to the bell housing on the gearbox-these have been know to break/corrode and cause strange problems. Also as far as I remember these have two fuse boxes one in the car and one under the bonnet-check the 'maxi fuses' these are the larger ones on in the under bonnet fuse box and make sure these aren't blown/corroded.Also check the tailgate wiring in the rubber boot between the car and the tailgate for chaffing/broken wires. If that doesn't throw up any problems- then it is going to be a case of getting a wiring diagram and checking the the lives/earths at the immobiliser unit etc.
Do the insturment cluster light's come when you turn the key to the on position ? check engine , security , brake , air bag ,ABS etc....
Do you know how to test automotive electrical circuit's with a DVOM - digital volt ohm meter ? Do you know what a electrical distribution diagram is ? How to use a wiring diagram to pin point testing areas in a wiring harness ? You need to learn how to test electrical system instead of guessing . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model , an engine size . Under system click on electrical distribution , then under subsystem click power distribution . Click search button , then the blue link. How did you check fuse's ? Pull them out an look at them ? Test with a volt meter . The metal tab's on top of the fuse .! The BEST Way TO Perform Parasitic Draw Test
Is there B+ voltage at the IGN/RAP / ACCY 60 amp fuse in the right maxi fuse box . Plus IGN maxi 60amp fuse in the left maxi fuse box. Have B+ voltage across both of these check for B+ voltage at the electrical part of the ignition switch ! Do you know where that is an how to get at it ? If you want to fix cars you need to learn how , not guess . Electric Testing Techniques You Need to Know
How to use a volt meter videos on youtube .