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EESS PCB replacement for the HMMWV ?

jbm998

New member
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Location
Topeka/KS
I have 87 m998 that was refurbished prior to my purchase from GOvPlanet. Has green KDS EESS, and everything worked great until The other day. I was installing a key ignition switch and connected wrong wire, now wait to start light doesn't work. Still starts but no wait light. Voltmeter shows no continuity across wait light wires. Could the wait light be fried? How to get it out from behind the top of the dash? Thanks
 

jbm998

New member
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Location
Topeka/KS
I got the wait light back to working after fixing a broke connection and finishing key ignition install. I hope I never have to replace the wait light or brake light, the dash does not look easy to get behind.
 

weave88

New member
8
1
0
Location
manchester twp.
I have a 1989 m998 that will not start , shorted wire for injector pump and engine will not start now. Do these boxes have to be matched to vehicle or certain years that need different boxes.. Also any way to bypass this starting system an just use a momentary switch for glow plugs or rewire the engine similar to a chevy or gm with that engine in it ??? Weave88
 

karlsmith

Member
40
1
6
Location
Sevierville, TN
Still can't believe that this isn't a Sticky. They should make one with Retiredwarhorses consolidating all the wisdom he dropped on us within the 7 pages of posts.

Anyway, swapped a one for one between two (fully functioning) machines. One with the old PCB & GPC, the other with the newest S3 and TSU. I ran them before beginning, both had a solid yellow wait light and both started immediately in 40 degree weather. I completed the box swap, but didn't do the GPC & TSU swaps. I decided to try to start them both. The one with the new S3 box and old GPC had a blinking wait light, but started fine. The one with the old PCB box and new TSU had no wait light and didn't start. Obviously, I'll swap the TSU and GPC out tomorrow and it'll be just fine.

Question, how jacked up is it to leave the new S3 box with the old GPC if it is working fine, just with a blinking yellow light instead of solid?
 

Retiredwarhorses

Well-known member
Steel Soldiers Supporter
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113
Location
Brentwood, Calif
A GPC and a TSU are completely different parts, a GPC in a truck with an S3 will get a flashing wait lamp, and that's it, the glowplugs don't energize....but then again, I've never metered them in this scenario. The flashing wait lamp is fault because the box doesn't see the TSU.
 
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86humv

Well-known member
Steel Soldiers Supporter
1,700
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113
Location
Texas
GPC First pic 12338772 Nartron TSU second pic....KDS CR2696A, And CR2696
DSC_000706.JPG
DSC_000709.JPG
 

karlsmith

Member
40
1
6
Location
Sevierville, TN
Here are pics that will hopefully clarify some questions for us novices tackling this job for the first time. Notice the GPC and TSU look identical and utilize the same harness. Once I married the proper units with their boxes everything worked perfectly. Thanks, Retiredwarhorses and the others that contributed to this!

EESS1.jpgEESS2.jpgEESS3.jpgEESS4.jpg
 

Chalvo

New member
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1
Location
Falcon Colorado
Pcb

I tried to get onto your website and it seems to not be working. Anyways, do you still have the used pcb's for $350? I am trying to get my truck starting reliably and I ain't having any luck so far.
 

Retiredwarhorses

Well-known member
Steel Soldiers Supporter
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4,171
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Location
Brentwood, Calif
Ahh, sorry, website is still under construction...my inventory changes constantly, so Best is to call the shop or PM me here.
i have no boxes right now...they are getting difficult to get as Nartron and KDS went to battle, seems Nartron won out and all new boxes will be Nartron only, and they raised the price to 8-900ea
 

TOBASH

Father, Surgeon, Cantankerous Grouch
Steel Soldiers Supporter
Supporting Vendor
3,569
3,474
113
Location
Brooklyn, NY
Anytime you want to have a retro-pricing sale, I'll put in an order to purchase 100 PCB or EESS at $350.00/unit, LOL
 

California Humvee

New member
11
0
1
Location
Beaumont california
TSU’s are backwards compatible for any version of EESS. The TSU will say “temperature sending unit” on the device itself
I got a problem not starting, I put new glow plugs, new TSU , new S3 box , I got fuel on the injectors , box is going doing the cycle , vehicle is on park, all it does it just turns white smoke is coming out of the pipe . but it wont start. WHAT I M DOING WRONG.
 

California Humvee

New member
11
0
1
Location
Beaumont california
i put new s3 box new tsu , new glow plugs , i got fuel on the injectors , vehicle is on park, truck it just turns but it wont start, what else do I do ? this truck is driving me nuts. white smoke coming out pipe as I crank engine. is there a sensor some where thart may be bad.
 
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