03 f-150 xlt ignition power
#1
03 f-150 xlt ignition power
good morning or afternoon I am unable to get power to the sylinoid signal wire from the ignition block tested at wire to negative side of battery( shows 4 v dc). also losing battery power during non-usage. also noted that the truck will start if we arc the sylinoid. we have change the ignition switch assembly and the starter sylinoid (suggested that the ignition switch was worn and creating a bypass of power). also there was some suggestions to remove the replacement ignition assembly and attempt to start it to see if there was an ajustment needed in key switch linkage.so my question is there an overriding safety system, parameter, fuse or relay that prevents this power or is it just a bad wire from ignition block to syliniod?
Thank you.
Thank you.
#5
checked fuses noticed that the passenger compartment relay #3 is not there but all fuses are ok in the right position. the volt reading is on the starter solenoid signal wire smaller red wire running through fire wall to solenoid post this is a snap fit electrical connector. is was a reading with the ignition switch in the start position with the wire off and a meter to the negative side of battery. we do have normal conditions in electrical system on radio fan and factory key less entry. and starter will engage and truck will run if we turn key to on and arc the starter solenoid.
thank you.
thank you.
#8
good afternoon checked the switch assembly for corrosion nothing found. the power module maybe? asked around and they suggested that the engine has gone into theft mode? the theft indicator light turns on when turning the key switch until key is in start position and remains off after. any help greatly appeciated thank you.
#10
the volt reading is on the starter solenoid signal wire smaller red wire running through fire wall to solenoid post this is a snap fit electrical connector. is was a reading with the ignition switch in the start position with the wire off and a meter to the negative side of battery.
1 - the starter relay is toasted and takes too much current through its coil, overloading the ignition block contacts and causing the large voltage drop across them, or
2 - your ignition switch starter contacts are toasted (or you have a wiring problem between the ignition block and the starter relay)
For 1: insert a meter (set to measure 10 or 20A DC current) in series with the starter relay, and put the key in start. If the current you see exceeds 1-2 A (for most cars and trucks), your starter relay is gone, replace it.
For 2: Measure the voltage at the starter relay terminal on the ignition block (where the red wire comes from) and put the key in start. If you see 12V, then the 8V are dropped on the wire - wiring problem, If you see 4V, then the 8V are dropped on the ignition switch - replace ignition block.
This should do it ... good luck, and let us know how it goes!
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