Good Morning All!
Recently my 1991 Volvo 740 Non Turbo Automatic has been giving me some dead battery in the morning or after sitting a while issues.
Here's whats going on:
• I have a sub woofer connected up properly to come on only with key on power
• I have done the "big 3" power and ground cable upgrade (man those stock ones are tiny)
• I have converted from the clutch fan to a 2 speed 940 electric fan. Instead of having it go off of the 3 wire bmw coolant sensor (which I have and can do) I have the low speed come on with key on ignition and high speed come on when I turn the AC on. (how that works is when the AC pressure sensor says pressure is good and sends the 12V to the clutch, I have tapped into that and send it to a relay as the signal for power to be sent to the OEM volvo electric fan relay (safety redundancy) that is fused.)
• Checking voltage (I have an HKS turbo timer (in prep for +T) installed that has a voltmeter) some days it will be at 13.8 at idle with not accessories on, and around 13.2-3 with ac on full blast.
Other days it will be much lower (13.0 no accessories and 12.2-3 with ac on full blast)
• My alternator field is working (magnetized when on) but it is very hot (too hot to touch bare) and I removed it and examined the voltage regulator and brushes. The top brush was worn down quite low so I got some new ones and replaced. The bearing in the alternator spins nicely
Still getting same voltage. I have since pulled the alternator and will get it tested today
• I had the battery pulled and checked and it tested out good.
• On my dashboard my battery light does not come on when the key is turned forward, and it does not come on when I ground the igniter (D+) wire from the alternator. I have the open housing later design alternator.
Connected to the dash, I have always had a funky speedometer that did not read the correct speed.
That is as much that I can think of right now. I want to give you guys as much information as possible so we can eliminate the unknown
Thanks for your help! I can add pictures of anything needed
Recently my 1991 Volvo 740 Non Turbo Automatic has been giving me some dead battery in the morning or after sitting a while issues.
Here's whats going on:
• I have a sub woofer connected up properly to come on only with key on power
• I have done the "big 3" power and ground cable upgrade (man those stock ones are tiny)
• I have converted from the clutch fan to a 2 speed 940 electric fan. Instead of having it go off of the 3 wire bmw coolant sensor (which I have and can do) I have the low speed come on with key on ignition and high speed come on when I turn the AC on. (how that works is when the AC pressure sensor says pressure is good and sends the 12V to the clutch, I have tapped into that and send it to a relay as the signal for power to be sent to the OEM volvo electric fan relay (safety redundancy) that is fused.)
• Checking voltage (I have an HKS turbo timer (in prep for +T) installed that has a voltmeter) some days it will be at 13.8 at idle with not accessories on, and around 13.2-3 with ac on full blast.
Other days it will be much lower (13.0 no accessories and 12.2-3 with ac on full blast)
• My alternator field is working (magnetized when on) but it is very hot (too hot to touch bare) and I removed it and examined the voltage regulator and brushes. The top brush was worn down quite low so I got some new ones and replaced. The bearing in the alternator spins nicely
Still getting same voltage. I have since pulled the alternator and will get it tested today
• I had the battery pulled and checked and it tested out good.
• On my dashboard my battery light does not come on when the key is turned forward, and it does not come on when I ground the igniter (D+) wire from the alternator. I have the open housing later design alternator.
Connected to the dash, I have always had a funky speedometer that did not read the correct speed.
That is as much that I can think of right now. I want to give you guys as much information as possible so we can eliminate the unknown
Thanks for your help! I can add pictures of anything needed