Recent Topics
Gifted a 2007 Impala
by 14Accent - 11/12/19 11:02 PM
Premium vs. Budget Snow tires
by edyvw - 11/12/19 10:11 PM
Range Rover 5.0 oil & BG MOA?
by xmreeves - 11/12/19 09:34 PM
Stalling and difficult restart problem
by RDMgr - 11/12/19 09:26 PM
New Fave way to remove snow from vehicles
by JC1 - 11/12/19 08:19 PM
Shying Away From Havoline 5w30
by Mr_Luke - 11/12/19 08:00 PM
New Way To Wash A Car
by buster - 11/12/19 07:52 PM
Sealed vs open bearings. What's better?
by motor_oil_madman - 11/12/19 07:51 PM
Wix WL10290XP CUT OPEN GM 22psi
by LotI - 11/12/19 07:04 PM
Do high beams make you angry?
by 1978elcamino - 11/12/19 06:46 PM
VALVOLINE V0-148 CUT OPEN
by 53' Stude - 11/12/19 06:38 PM
VW Jetta oil filter CUT OPEN
by 53' Stude - 11/12/19 06:31 PM
Turtle Wax Seal & Shine On Top of Ice or Vice-Versa ?
by Dwight_Frye - 11/12/19 06:10 PM
Timing Cover Leak in Toyota/Lexus
by Gebo - 11/12/19 05:10 PM
Anyone running only Malwarebytes for security
by Donald - 11/12/19 05:07 PM
104+ Fuel Injector Pro ?
by ChrisD46 - 11/12/19 04:55 PM
Mobil 1 FS 0w40 vs Castrol 0w40
by Ndx - 11/12/19 04:14 PM
Newest Members
Hombre909, DeLong, Scuder, Jasonrmcc, Capacc
69840 Registered Users
Who's Online Now
46 registered members (Aichiguy, Bailes1992, 77GrandPrix, bradepb, 69Torino, 9 invisible), 987 guests, and 20 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics297,340
Posts5,113,472
Members69,840
Most Online3,589
Nov 2nd, 2019
Donate to BITOG
Print Thread
Hop To
'94 Grand Am Blackout No Electrical Power #4638562 01/18/18 09:06 AM
Joined: Jan 2004
Posts: 6,009
B
benjamming Offline OP
OP Offline
B
Joined: Jan 2004
Posts: 6,009
1994 Pontiac Grand Am 3.1L cranked fine yesterday afternoon. Stopped at the library but when I went to crank it again, all electrical power was lost. As I was turning the key, the instrumental panel started lighting up like normal but ~ halfway through turning the key, everything went off. No power windows, locks, dome light, no clicking, nothing. Battery is good at 12.6V.

What should be my sequence of testing? Voltmeter is ready.

Thanks.

Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4638605 01/18/18 09:49 AM
Joined: Jan 2008
Posts: 4,274
E
exranger06 Offline
Offline
E
Joined: Jan 2008
Posts: 4,274
First check the negative battery cable. Follow where it goes (probably the engine block) and see if there's any voltage between that point and the negative battery post. There shouldn't be any. There should be another cable that goes from the engine to the body. See if there's any voltage between the engine and the body. Again, there shouldn't be any. If that's good, then start checking the positive cable. Follow the positive cable to the fuse box and see if there's voltage difference between there and the positive battery post. If that's good, just keep working your way downstream until you find the voltage drop.


2006 Ford Ranger Sport
1992 Honda Accord EX
2013 Toyota Sienna XLE AWD
1994 Ford Bronco XLT (project)
2011 Cadillac Escalade ESV (wife's)
Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4638627 01/18/18 10:06 AM
Joined: May 2012
Posts: 6,773
DoubleWasp Offline
Offline
Joined: May 2012
Posts: 6,773
Do as noted above. There's a borderline connection somewhere. Thing about those connections is that starting is always the event that sets them off, especially when dealing with a loose ground.

Start with the simple part: Battery terminals. If they are even a hair loose, they will do exactly what you are experiencing. Turn the key, blanks out.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4638681 01/18/18 11:11 AM
Joined: Dec 2016
Posts: 2,543
M
maverickfhs Offline
Offline
M
Joined: Dec 2016
Posts: 2,543
I have experienced something similar in the past, could be few basic things: 1- As stated above 2- loose ground or a corroded one 3- Worst case, bad battery.

Curious, how old is battery?


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4638686 01/18/18 11:13 AM
Joined: Sep 2015
Posts: 2,239
M
mk378 Offline
Offline
M
Joined: Sep 2015
Posts: 2,239
Turn on the key and measure at the battery again. A bad battery can measure voltage with nothing connected, but then drop to near zero with the slightest load.

Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4638835 01/18/18 01:27 PM
Joined: Dec 2016
Posts: 9,570
L
Linctex Offline
Offline
L
Joined: Dec 2016
Posts: 9,570
Don't measure voltage on the battery.

Measure where the battery cables terminate.

Generally, it's most likely the battery terminals are corroded.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4638872 01/18/18 02:10 PM
Joined: Sep 2015
Posts: 2,239
M
mk378 Offline
Offline
M
Joined: Sep 2015
Posts: 2,239
I'm guessing it's a GM side terminal battery so not a lot of choice where to measure.

If you have a post terminal battery you want to measure both-- first directly on the posts to confirm that the battery itself is live, then on the terminals.

Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4638986 01/18/18 04:23 PM
Joined: Jan 2004
Posts: 6,009
B
benjamming Offline OP
OP Offline
B
Joined: Jan 2004
Posts: 6,009
Battery is 4.5 years old. I've only put ~40k miles on it in that time. Yes I know that mileage isn't necessarily the issue just stating for completeness.
No corrosion on terminals. I've had that issue on my '02 Accord & learned from it.
It's an Interstate MT-75 side terminal.
Terminals are tight as I checked that yesterday (again previous issue/learning with that).
So no thoughts on it being a fuse of some sort?

Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4640552 01/19/18 11:32 PM
Joined: Sep 2004
Posts: 8,528
A
andyd Offline
Offline
A
Joined: Sep 2004
Posts: 8,528
You have a bad connection someplace. Not a fan of side terminals. Take them apart and clean them. Don't know about GMs but Ford used fusible links back then. What happens when you turn on the head lights? Check the ground strap jumping around the motor mount. Is there a jumper from the back of the engine and the firewall? Sitting doesn't do good things to cars,especially 24 yr old cars. How are the connections at the starter? AGe of the car, you're gonna get wiring troubles. wires corrode, fray at the ends where the jacket shrinks back and exposes copper.They get brittle and don't like being messed with. BE CAREFUL.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: '94 Grand Am Blackout No Electrical Power [Re: benjamming] #4641036 01/20/18 02:02 PM
Joined: Jan 2004
Posts: 6,009
B
benjamming Offline OP
OP Offline
B
Joined: Jan 2004
Posts: 6,009
Positive terminal had come loose slightly. Tightened back (spec is 11 ft-lb). Started up well.
BTW, vehicle doesn't sit but rather is my daily driver due to good gas mileage (26-28 mpg).

Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™