glow plug fuse keeps blowing
Thread Starter
|
Freshman User
Joined: Sep 2003
Posts: 26
Likes: 0
From: kansas city
glow plug fuse keeps blowing
It has just turned cold here in kansas city. My 97 PSD keeps burning up fuses when the glow plugs come on. The last 2 fuses didn't last 2 seconds-they burned up as soon as I turned over the key. The second one was a 40-amp (in a 30-amp circuit)!
Any suggestions? Plugs Shorted to ground? Bad wiring? Bad relay?
In the owners manual the glow plugs and the PCM are on the same circuit (Fuse #22 in power distribution box under the hood, drivers side). Could there be a problem with the PCM?
Thanks for any help.
Any suggestions? Plugs Shorted to ground? Bad wiring? Bad relay?
In the owners manual the glow plugs and the PCM are on the same circuit (Fuse #22 in power distribution box under the hood, drivers side). Could there be a problem with the PCM?
Thanks for any help.
Posting Guru
Joined: Dec 2000
Posts: 2,321
Likes: 0
From: Western Colorado USA
Disconnect the power to the glow plug relay and try another fuse. If the fuse holds, then you'll know it's somewhere between the relay and the glowplugs. You probably have a bad spot in the wiring that is grounding out.
Thread Starter
|
Freshman User
Joined: Sep 2003
Posts: 26
Likes: 0
From: kansas city
Thanks CatMech, I know the heater looks bad and the wire has come unsoldered.
Today, it went like this. Glow plugs turned on fine and the engine started. Ran fine for a couple of minutes until I saw a draw on the voltmeter on the dash, then it died. Checked the fuse and it was gone again.
Do you still think it is the fuel heater?
Is the fuel heater synchronized with the glow plugs or does it just come on until the engine warms up?
Tom
Today, it went like this. Glow plugs turned on fine and the engine started. Ran fine for a couple of minutes until I saw a draw on the voltmeter on the dash, then it died. Checked the fuse and it was gone again.
Do you still think it is the fuel heater?
Is the fuel heater synchronized with the glow plugs or does it just come on until the engine warms up?
Tom
PREMIUM SPONSOR
Joined: Sep 2003
Posts: 2,630
Likes: 217
From: North East Ohio
I don't have my EVTM handy, but is it the #22 Maxi fuse under the hood? If so, it's the fuel heater shorting out and shuts the truck down. Disconnect the fuel heater and forget it. You really shouldn't need it in KC anyway.
If that doesn't do it, the valve cover gasket/wiring harness and the under cover harnesses are known to short/melt/generally go bad. You may have to track it down that way, easy to replace.
FYI, I carry a spare vc gasket/harness and an under vc wire harness in the truck.
If that doesn't do it, the valve cover gasket/wiring harness and the under cover harnesses are known to short/melt/generally go bad. You may have to track it down that way, easy to replace.
FYI, I carry a spare vc gasket/harness and an under vc wire harness in the truck.
__________________
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
Thread Starter
|
Freshman User
Joined: Sep 2003
Posts: 26
Likes: 0
From: kansas city
Thanks DZL JIM, It is the #22, 30-amp Maxi fuse in the fuse box. Last night I didn't plug in the engine heater, and I disconnected the fuel heater. This morning I started up with the glow plugs with no problem. Thanks for the advice and confirmation.
Tom
Thread
Thread Starter
Forum
Replies
Last Post
chaoticghost
1999 - 2003 7.3L Power Stroke Diesel
23
Mar 15, 2017 05:23 PM
galute
1994.5 - 1997 7.3L Power Stroke Diesel
11
Nov 6, 2010 11:32 AM
