Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
If you havent checked for any damaged or broken wiring leading to the relay or fuse panels this needs done first.If any wiring is found to be at fault the affected wiring will need repaired or replaced to correct this issue here.If this has already been checked and found to be o.k. let me know so we can continue from here.
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You should have a red wire and a black wire at the alternator that should have 12 volts dc on them with the key on or off.You should also have a brown wire that has power on it with the key on at the alternator.Which of these wires do not have power on them?
My info on this model shows you get 12 volts one from the starter solenoid at the red wire to the starter,one on the black wire leading from the battery to the starter and then 12 volts at the brown wire leading from the 25 amp fuse 7.I dont see a relay in line with these signals here.Are you sure you posted the correct year and model vehicle here?I just want to make sure on this.
No problem on the delays and I hope she is doing o.k.
Looking at the diagram info on it here I dont see any relays in line for the charging circuit.Is there a way you can check the wiring at the alternator to make sure you have the colored wires I have posted above then test these wires for the signals I have posted above so we can continue here,when you get a chance as there is no hurry for me.
Let me know,thanks Pete.
O.k. with the key on does the no charge or charge light come on on the dash at all?
O.k.,that black wire comes directly from the battery itself with no intermediate connections.Trace this black wire back to the battery and see if you see any bulges in it or corrosion indicating it needs replaced and to see if there are any nicks or cuts that need repaired and that the connection to the battery positive for this wire is clean and tight.If you find a fault correct it and see how the vehicle operates from there and let me know.
If this is in fact the brown wire and not the black or red wire this wire runs from the charge light in the instrument cluster and this light is powered by fuse 7 which is a 25 amp fuse.If this fuse is good and the charge light is not lighting up on the dash this will cause this issue here and it is usually the instrument cluster itself that needs removed and taken apart to replace the burned out charge light bulb.I have seen this bulb burn out before and causes a no charge issue which also can lead to other electrical issues inside the vehicle.I would check into this first here to see if the bulb or fuse needs replaced.
If you look inside the vents there should be little catch tabs that need carefully pried or pushed to release the vents from the dash.Once these are pushed or pried then vents should pull out and remove from the dash itself then the screws and cluster can be removed.You might be able to remove the bulb yourself and obtain a new replacement bulb from a dealer or local parts store to correct this here.
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I apologize for the delay.
Check fuse 7 which is a 25 amp fuse and make sure it is good.If found blown replace it and see if this resolves the issue here.If it is o.k. take a test light or multi meter and test this fuse for power across it with the key on or engine running.You might remove it and turn on the key and test one of the terminals the fuse seated into for power or 12 volts DC.Let me know what you come up with here.
Do you see any issues with the wiring or connections at the instrument cluster at all?
Let me know so we can continue,thanks Pete.