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07-11-2011, 10:50 PM
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#1
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Junior Member
Join Date: Jul 2011
Posts: 5
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1990 Gulfstream won't start
My wife and I just purchased a 1990 Gulfstream Sun-Clipper. It is a P30 GMC chassis with the 8.1 liter 454 engine in it. We bought it from a friend of my wifes. When we turn the key to start it nothing happens not even a click. The previous owner went out and purchased 2 new Interstate batteries and put them in and still nothing happened. There are no headlights, clicking nothing.... the previous owner mentioned the Isolator relay??? I need help...I was also told that they is a loss of power between the starter and the batteries. We are not even getting a "click" from the starter....
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07-11-2011, 10:52 PM
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#2
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Senior Member
Monaco Owners Club
Join Date: Apr 2009
Location: Granbury, Texas
Posts: 1,394
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First, look for the battery disconnect switch. There should be one for the chassis (drivetrain) batteries and one for the house batteries.
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07-11-2011, 11:07 PM
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#3
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Junior Member
Join Date: Jul 2011
Posts: 5
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thanks I will
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07-12-2011, 05:37 AM
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#4
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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There is no isolater relay in the chassis circuit that involve the ignition, headlights, and starter. Check that all the battery cable connections on the starter and the negative ground battery cable are clean and tight.
__________________
Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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07-13-2011, 02:32 AM
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#5
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Sep 2007
Posts: 2,976
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Quote:
Originally Posted by Sun_Clipper
My wife and I just purchased a 1990 Gulfstream Sun-Clipper. It is a P30 GMC chassis with the 8.1 liter 454 engine in it. We bought it from a friend of my wifes. When we turn the key to start it nothing happens not even a click. The previous owner went out and purchased 2 new Interstate batteries and put them in and still nothing happened. There are no headlights, clicking nothing.... the previous owner mentioned the Isolator relay??? I need help...I was also told that they is a loss of power between the starter and the batteries. We are not even getting a "click" from the starter....
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you state that you have 2 new batteries.
my question is how many house batteries does your moho have? mine has 2 house and 1 starting (chassis) battery. so, is it possible that you have an old, dead starting battery and 2 new house batteries?
the 8.1L engine is 496 cu in, the 7.4L engine is 454 cu in.
__________________
01 WINNEBAGO 35U W20.8.1L 5sp allison SW Wa,. Good Sam, SKP. RVM 198 AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. Michelins, TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '21MB GLA FWD on dolly
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07-13-2011, 06:19 AM
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#6
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Senior Member
Join Date: Feb 2011
Location: Snowbird - Waterford Mi and Citrus Springs Fl.
Posts: 3,609
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If nothing has changed from the time you brought it home, my guess is the starting battery is dead. Why it's dead is another question. Could be a junk battery, could be something is draining it. Whatever, try charging it and see where that leaves you.
__________________
1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake
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07-13-2011, 06:42 AM
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#7
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club
Join Date: Jun 2009
Location: Somewhere in the woods in Belfair, WA, WA
Posts: 1,250
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Sun Clipper: look for that switch that says Battery Disconnect (main & aux) or something similar(ours is in a cupboard over the front door) . If Main is off, the engine will not start, even with a new battery.
Check, clean and tighten the terminals on your chassis (starting) battery.
Try jump starting the coach; if it even TRIES to turn over, a weak battery is the problem.
If none of the above makes any difference, you'll need to do a little more investigating...
__________________
Life rocks when your house rolls
Senior Chief & the Cheese Queen
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07-13-2011, 02:43 PM
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#8
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Junior Member
Join Date: Jul 2011
Posts: 5
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I have 2 new Interstates under the hood right behind the front grill on a
battery tray. If there are any other batteries I am unaware..
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07-24-2011, 06:25 PM
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#9
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Senior Member
Join Date: Apr 2011
Posts: 668
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Did you ever find the problem?
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1990 28' Georgie Boy, 454, 4bbl, Thorley Headers, Recurved Distributor, 8.0 mpg. RVM 76
CAMPING: WHERE YOU SPEND A SMALL FORTUNE TO LIVE LIKE A HOMELESS PERSON.
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08-01-2011, 10:04 PM
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#10
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Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
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Quote:
Originally Posted by Sun_Clipper
I have 2 new Interstates under the hood right behind the front grill on a
battery tray. If there are any other batteries I am unaware..
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Sunclipper, you posted on another thread yesterday stating you needed a wiring schematic for your coach to trace the battery solenoid switch, but really you should be able to trace down the problem with a volt meter.
You mention in this thread you have 2 batteries, but most coaches of that vintage used 3 batteries, 2 for the house and 1 for the chassis. You mentioned the PO installed 2 new batteries, but still would not start. Sounds like either the chassis battery is missing, wired improperly, or located somewhere else and is completely dead.
First thing I would do is charge the new batteries to make sure they are full and at 12.7 volts when rested, then look on the dash for a momentary switch. The momentary switch will connect the chassis battery with the house batteries for emergency starting. Hold that switch on and crank the engine over. If it starts or cranks you will have a beginning point to diagnose the problem.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord
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08-01-2011, 10:46 PM
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#11
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Junior Member
Join Date: Jul 2011
Posts: 5
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Wannabee, I was told by the PO that I only have 2 batteries and they are both new. I bypassed the battery switch by taking all the hot leads and clamping them all together and the MH starts up like it was brand new. I have a good friend of the PO coming over within the next couple of days to go through some things and test them. We'll see what happens..
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08-01-2011, 10:49 PM
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#12
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Senior Member
Join Date: May 2010
Location: South Carolina
Posts: 322
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1-Check battery for a good ground.
2-If cable connections are good, then check batteries for adequate voltage; if this is lacking, charge or replace as necessary
3-If batteries are good and proper voltage, touch a test light to the small wire connections on the starter, and have someone attempt to start the engine. REMEMBER SAFETY HERE.
4-If the test light lights up when trying to start the engine, this will show that voltage is coming from the ignition switch down to the starter. If you have voltage and it will not turn the starter, the starter is bad.
5-If you have no voltage, then the problem will either be the ignition switch (electrical side) or the neutral safety switch for the transmission. ( this switch prevents a vehicle from being started while it is in gear).
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08-01-2011, 11:22 PM
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#13
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Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
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Quote:
Originally Posted by Sun_Clipper
Wannabee, I was told by the PO that I only have 2 batteries and they are both new. I bypassed the battery switch by taking all the hot leads and clamping them all together and the MH starts up like it was brand new. I have a good friend of the PO coming over within the next couple of days to go through some things and test them. We'll see what happens..
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OK, now we're getting somewhere. We are talking about an electrical solenoid and not a manual switch correct?
You say when you bypass the battery solenoid switch it starts fine.
The solenoid needs a secondary source of 12 volts to allow it to be engaged. (turned on) Use a volt meter to check for 12 volts at the smaller gauge wire going to it. If no voltage is present, check all fuses and trace the electrical back until you find the source of the problem. If 12 volts is there, the solenoid is faulty.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord
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