1990 Pickup charge relay

This is for "general" electrical discussions. Audio, security, remote start, and power accessories should go here, since they don't seem to fit anywhere else. Not for diesel-specific (like glow systems), or gasoline-specific (like ignition systems) topics.
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Blackfox
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Posts: 8
Joined: Sat Aug 20, 2016 3:32 pm
Location: Red Deer
Isuzu vehicle(s): 1990 Isuzu Pickup XS Spacecab, 2.6, MUA5, 4x4 "Cherry Bomb"

1990 Pickup charge relay

Postby Blackfox » Sun Aug 21, 2016 2:11 pm

So I'm sorta in a bit of a spot. My charge relay is shot and I'm in the middle of pretty much nowhere. I know it's the charge relay because my voltage has dropped right off and the truck won't stay running. Is it safe to bypass the relay to get me home?
All held the finite and infinite as unrelated.
No one could forsee the two become one.

1990 Pickup XS Spacecab: 2.6, 4x4."Cherry Bomb"
(Keeps Right)
1967 Newport Sedan: 383(6.3), Total length=2.5 P'ups. "Serenity"
(Goes Left)

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JoeIsuzu
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Joined: Thu Aug 19, 2004 9:11 am
Location: Germantown (next to Elvistown), TN
Isuzu vehicle(s): Original owner, '83 LS Diesel, 5-spd, 2wd, Long Bed, restoration in progress!

Re: 1990 Pickup charge relay

Postby JoeIsuzu » Sun Aug 21, 2016 5:27 pm

I hope one of our gas gurus will see this and chime in. Take my input with a grain of salt. But I didn't think the charge relay affected engine operation. On the diesel, it serves to energize some of the other stuff that doesn't need to be running until there's a positive charge going through the system. If that's the case, I'd say your issue is something else--but I'm clueless as to what. It just might make a difference which gas engine you have. I'm going to just guess you have a 2.6. If you have a 4-cylinder, and a clutch cable, it's a 2.3. If you have a 4-cylinder, and a clutch master cylinder, it's a 2.6. If I'm not mistaken, both have fuel pumps, but in different locations.

Jack

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Blackfox
Regular Member
Posts: 8
Joined: Sat Aug 20, 2016 3:32 pm
Location: Red Deer
Isuzu vehicle(s): 1990 Isuzu Pickup XS Spacecab, 2.6, MUA5, 4x4 "Cherry Bomb"

Re: 1990 Pickup charge relay

Postby Blackfox » Sun Aug 21, 2016 8:55 pm

I managed to get her limping, and got it home but my battery is toast. I do have the 2.6, and the charge relay for some reason wouldn't let the truck start. Closed the points and she fired right up, but now my battery won't charge.

All these fancy relays and electronics are new to me. I drive a '67 daily. I can fix that with some shoe string, bubblegum and my trusty pocket knife.
All held the finite and infinite as unrelated.
No one could forsee the two become one.

1990 Pickup XS Spacecab: 2.6, 4x4."Cherry Bomb"
(Keeps Right)
1967 Newport Sedan: 383(6.3), Total length=2.5 P'ups. "Serenity"
(Goes Left)

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puttputtinpup
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Posts: 10242
Joined: Sat Oct 08, 2005 5:18 am
Location: Winston Salem, NC

Re: 1990 Pickup charge relay

Postby puttputtinpup » Mon Aug 22, 2016 4:34 am

Here's a list of vehicles that use the same charge relay. Rock Auto's site lists these other vehicles that have the RY55 charge relay. Suggestion: Go to Pull A Part and snatch up a few of these off any of these vehicles.
ACURA SLX (1996 - 1999)
CHEVROLET SPECTRUM (1985 - 1988)
GEO SPECTRUM 1989
ISUZU AMIGO (1989 - 1994)
ISUZU I-MARK (1981 - 1989)
ISUZU IMPULSE (1983 - 1992)
ISUZU PICKUP (1981 - 1995)
ISUZU RODEO (1991 - 1995)
ISUZU STYLUS (1991 - 1993)
ISUZU TROOPER (1984 - 2002)
NISSAN 200SX (1981 - 1983)
NISSAN 280ZX (1980 - 1983)
NISSAN MAXIMA (1982 - 1988)
NISSAN PULSAR 1983
NISSAN PULSAR NX (1983 - 1986)
NISSAN STANZA (1984 - 1986)


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